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Cover Page - shares	6 Months Ended
Cover Page - shares	Jun. 30, 2020	Jul. 31, 2020
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Entity Registrant Name	MAGNACHIP SEMICONDUCTOR Corp
Entity Central Index Key	0001325702
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Incorporation, State or Country Code	DE
Title of 12(b) Security	Common Stock
Trading Symbol	MX
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding		35,160,216
Entity File Number	001-34791
Entity Tax Identification Number	83-0406195
Entity Address, Address Line One	c/o MagnaChip Semiconductor S.A. 1
Entity Address, City or Town	Allée Scheffer
Entity Address, Postal Zip Code	L-2520
City Area Code	352
Local Phone Number	45-62-62
Document Quarterly Report	true
Document Transition Report	false
Entity Address, Country	LU

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 192,824	$ 151,657
Accounts receivable, net	48,548	47,447
Inventories, net	45,511	41,404
Other receivables	10,406	10,200
Prepaid expenses	8,598	9,003
Hedge collateral (Note 9)	11,740	9,820
Other current assets (Notes 10 and 18)	7,405	10,013
Current assets held for sale (Note 2)	205,086	99,821
Total current assets	530,118	379,365
Property, plant and equipment, net	69,110	73,068
Operating lease right-of-use assets	1,182	1,876
Intangible assets, net	2,590	2,769
Long-term prepaid expenses	2,936	5,757
Other non-current assets	9,212	9,059
Non-current assets held for sale (Note 2)		123,434
Total assets	615,148	595,328
Current liabilities
Accounts payable	42,366	40,376
Other accounts payable	4,049	6,410
Accrued expenses (Note 8)	45,735	44,799
Operating lease liabilities	1,053	1,625
Current portion of long-term borrowings, net	82,706
Other current liabilities (Note 10)	5,481	3,583
Current liabilities held for sale (Note 2)	146,569	37,040
Total current liabilities	327,959	133,833
Long-term borrowings, net	223,242	304,743
Accrued severance benefits, net	49,927	51,181
Other non-current liabilities	7,845	9,671
Non-current liabilities held for sale (Note 2)		110,881
Total liabilities	608,973	610,309
Commitments and contingencies (Note 18)
Stockholders' equity
Common stock, $0.01 par value, 150,000,000 shares authorized, 44,248,706 shares issued and 35,143,033 outstanding at June 30, 2020 and 43,851,991 shares issued and 34,800,312 outstanding at December 31, 2019	443	439
Additional paid-in capital	155,591	152,404
Accumulated deficit	(52,709)	(58,131)
Treasury stock, 9,105,673 shares at June 30, 2020 and 9,051,679 shares at December 31, 2019, respectively	(107,649)	(107,033)
Accumulated other comprehensive income (loss)	10,499	(2,660)
Total stockholders' equity (deficit)	6,175	(14,981)
Total liabilities and stockholders' equity	$ 615,148	$ 595,328

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Jun. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	44,248,706	43,851,991
Common stock, shares outstanding	35,143,033	34,800,312
Treasury stock, shares	9,105,673	9,051,679

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Net sales	$ 118,828	$ 140,885	$ 239,301	$ 248,152
Cost of sales	86,690	109,263	178,033	197,507
Gross profit	32,138	31,622	61,268	50,645
Operating expenses:
Selling, general and administrative expenses	12,408	11,095	24,510	23,131
Research and development expenses	11,108	11,772	21,617	23,816
Other charges			554
Total operating expenses	23,516	22,867	46,681	46,947
Operating income:	8,622	8,755	14,587	3,698
Interest expense	(5,430)	(5,439)	(11,037)	(11,076)
Foreign currency gain (loss), net	8,469	(11,571)	(22,502)	(22,181)
Loss on early extinguishment of long-term borrowings, net				(42)
Other income, net	791	551	1,629	1,138
Income (loss) from continuing operations before income tax expense	12,452	(7,704)	(17,323)	(28,463)
Income tax expense	678	786	1,981	1,582
Income (loss) from continuing operations	11,774	(8,490)	(19,304)	(30,045)
Income (loss) from discontinued operations, net of tax	17,397	(1,030)	24,726	(13,600)
Net income (loss)	$ 29,171	$ (9,520)	$ 5,422	$ (43,645)
Basic earnings (loss) per common share—
Continuing operations	$ 0.34	$ (0.25)	$ (0.55)	$ (0.88)
Discontinued operations	0.50	(0.03)	0.71	(0.40)
Total	0.84	(0.28)	0.16	(1.28)
Diluted earnings (loss) per common share—
Continuing operations	0.28	(0.25)	(0.55)	(0.88)
Discontinued operations	0.37	(0.03)	0.71	(0.40)
Total	$ 0.65	$ (0.28)	$ 0.16	$ (1.28)
Weighted average number of shares—
Basic	35,092,312	34,245,127	34,992,734	34,220,141
Diluted	46,474,237	34,245,127	34,992,734	34,220,141
Standard Products Group [Member]
Net sales	$ 108,955	$ 132,006	$ 219,691	$ 232,270
Cost of sales	76,817	100,384	158,423	181,625
Gross profit	32,138	31,622	61,268	50,645
Fab Three Foundry Services [Member]
Net sales	9,873	8,879	19,610	15,882
Cost of sales	9,873	$ 8,879	19,610	$ 15,882
Gross profit

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 29,171	$ (9,520)	$ 5,422	$ (43,645)
Other comprehensive income (loss)
Foreign currency translation adjustments	(6,543)	7,680	15,708	14,984
Derivative adjustments
Fair valuation of derivatives	2,204	(2,499)	(2,800)	(2,900)
Reclassification adjustment for loss on derivatives included in net income (loss)	193	1,864	251	1,953
Total other comprehensive income (loss)	(4,146)	7,045	13,159	14,037
Total comprehensive income (loss)	$ 25,025	$ (2,475)	$ 18,581	$ (29,608)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock Outstanding [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings (Deficit) [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance beginning at Dec. 31, 2018	$ (17,310)		$ 431	$ 142,600	$ (36,305)	$ (103,926)	$ (20,110)
Balance, Shares beginning at Dec. 31, 2018		34,441,232
Stock-based compensation	1,441			1,441
Exercise of stock options	149		0	149
Exercise of stock options, Shares		24,558
Settlement of restricted stock units			2	(2)
Settlement of restricted stock units, Shares		168,493
Acquisition of treasury stock	(2,588)					(2,588)
Acquisition of treasury stock, Shares		(394,102)
Other comprehensive income (loss), net	14,037						14,037
Net income (loss)	(43,645)				(43,645)
Balance ending at Jun. 30, 2019	(47,916)		433	144,188	(79,950)	(106,514)	(6,073)
Balance, Shares ending at Jun. 30, 2019		34,240,181
Balance beginning at Mar. 31, 2019	(46,311)		433	143,315	(70,430)	(106,511)	(13,118)
Balance, Shares beginning at Mar. 31, 2019		34,223,502
Stock-based compensation	772			772
Exercise of stock options	101		0	101
Exercise of stock options, Shares		15,934
Settlement of restricted stock units			0	0
Settlement of restricted stock units, Shares		1,040
Acquisition of treasury stock	(3)					(3)
Acquisition of treasury stock, Shares		(295)
Other comprehensive income (loss), net	7,045						7,045
Net income (loss)	(9,520)				(9,520)
Balance ending at Jun. 30, 2019	(47,916)		433	144,188	(79,950)	(106,514)	(6,073)
Balance, Shares ending at Jun. 30, 2019		34,240,181
Balance beginning at Dec. 31, 2019	$ (14,981)		439	152,404	(58,131)	(107,033)	(2,660)
Balance, Shares beginning at Dec. 31, 2019	34,800,312	34,800,312
Stock-based compensation	$ 2,528			2,528
Exercise of stock options	663		1	662
Exercise of stock options, Shares		88,351
Settlement of restricted stock units			3	(3)
Settlement of restricted stock units, Shares		308,364
Acquisition of treasury stock	(616)					(616)
Acquisition of treasury stock, Shares		(53,994)
Other comprehensive income (loss), net	13,159						13,159
Net income (loss)	5,422				5,422
Balance ending at Jun. 30, 2020	$ 6,175		443	155,591	(52,709)	(107,649)	10,499
Balance, Shares ending at Jun. 30, 2020	35,143,033	35,143,033
Balance beginning at Mar. 31, 2020	$ (21,156)		442	153,286	(81,880)	(107,649)	14,645
Balance, Shares beginning at Mar. 31, 2020		35,054,682
Stock-based compensation	1,643			1,643
Exercise of stock options	663		1	662
Exercise of stock options, Shares		88,351
Other comprehensive income (loss), net	(4,146)						(4,146)
Net income (loss)	29,171				29,171
Balance ending at Jun. 30, 2020	$ 6,175		$ 443	$ 155,591	$ (52,709)	$ (107,649)	$ 10,499
Balance, Shares ending at Jun. 30, 2020	35,143,033	35,143,033

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities
Net income (loss)	$ 5,422	$ (43,645)
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Depreciation and amortization	10,479	16,505
Provision for severance benefits	10,179	6,406
Amortization of debt issuance costs and original issue discount	1,205	1,134
Loss on foreign currency, net	26,397	24,609
Restructuring and other charges	141	732
Provision for inventory reserves	2,033	8,940
Stock-based compensation	2,528	1,441
Loss on early extinguishment of long-term borrowings, net		42
Other	(111)	(494)
Changes in operating assets and liabilities
Accounts receivable, net	(438)	(20,974)
Unbilled accounts receivable, net	10,933	6,201
Inventories	(14,060)	(7,351)
Other receivables	67	(2,969)
Other current assets	4,747	5,929
Accounts payable	4,947	32,137
Other accounts payable	(5,898)	(3,960)
Accrued expenses	161	2,880
Other current liabilities	1,220	(7,491)
Other non-current liabilities	1,238	1,716
Payment of severance benefits	(4,272)	(4,579)
Other	147	(54)
Net cash provided by operating activities	57,065	17,155
Cash flows from investing activities
Proceeds from settlement of hedge collateral	5,855	4,627
Payment of hedge collateral	(7,841)	(8,395)
Purchase of property, plant and equipment	(8,842)	(15,000)
Payment for intellectual property registration	(473)	(642)
Collection of guarantee deposits	47	388
Payment of guarantee deposits	(571)	(1,330)
Other	21	193
Net cash used in investing activities	(11,804)	(20,159)
Cash flows from financing activities
Repurchase of long-term borrowings		(1,175)
Proceeds from exercise of stock options	663	149
Acquisition of treasury stock	(1,021)	(2,588)
Repayment of financing related to water treatment facility arrangement	(267)	(281)
Repayment of principal portion of finance lease liabilities	(119)	(118)
Net cash used in financing activities	(744)	(4,013)
Effect of exchange rates on cash and cash equivalents	(3,350)	(1,668)
Net increase (decrease) in cash and cash equivalents	41,167	(8,685)
Cash and cash equivalents
Beginning of the period	151,657	132,438
End of the period	192,824	123,753
Supplemental cash flow information
Cash paid for interest	9,522	9,549
Cash paid for income taxes	1,889	1,881
Non-cash investing activities
Property, plant and equipment additions in other accounts payable	$ 602	$ 687

Business, Basis of Presentation and Significant Accounting Policies	6 Months Ended
	Jun. 30, 2020
Accounting Policies [Abstract]
Business, Basis of Presentation and Significant Accounting Policies	1. Business, Basis of Presentation and Significant Accounting Policies Business MagnaChip Semiconductor Corporation (together with its subsidiaries, the “Company”) is a designer and manufacturer of analog and mixed-signal semiconductor platform solutions for communications, Internet of Things (“IoT”) applications, consumer, industrial and automotive applications. The Company provides technology platforms for analog, mixed signal, power, high voltage, non-volatile memory and Radio Frequency (“RF”) applications. On March 30, 2020, the Company entered into a definitive Business Transfer Agreement (the “BTA”) for the sale of its Foundry Services Group business and its fabrication facility located in Cheongju (“Fab 4”), the larger of the Company’s two 8-inch manufacturing facilities, to Magnus Semiconductor, LLC, a Korean limited liability company, or one of its wholly owned subsidiaries (the “Buyer”) for a purchase price equal to the KRW equivalent of $344.7 million in cash, subject to working capital adjustments set forth in the BTA. The Buyer is a special purpose company formed by Alchemist Capital Partners Korea Co., Ltd. and Credian Partners, Inc. This planned divestiture of the Foundry Services Group business and Fab 4 will allow the Company to strategically shift its operational focus to its standard products business. The Foundry Services Group was historically a reportable segment. As a result of the entry into the BTA, the results of the Foundry Services Group were classified as discontinued operations in the Company’s consolidated statements of operations and excluded from both continuing operations and segment results for all periods presented. Accordingly, commencing with the first quarter of 2020, the Company has one reportable segment: its standard products business, together with transitional foundry services associated with its fabrication facility located in Gumi, Korea, known as “Fab 3,” that it expects to perform for the Buyer for a period of up to three years (the “Transitional Fab 3 Foundry Services”). The Company’s standard products business includes its Display Solutions and Power Solutions business lines. The Company’s Display Solutions products provide panel display solutions to major suppliers of large and small rigid and flexible panel displays, and mobile, automotive applications and home appliances. The Company’s Power Solutions products include discrete and integrated circuit solutions for power management in communications, consumer and industrial applications. Basis of Presentation The accompanying unaudited interim consolidated financial statements of the Company have been prepared in accordance with generally accepted accounting principles in the United States of America (“US GAAP”). These interim consolidated financial statements include normal recurring adjustments and the elimination of all intercompany accounts and transactions which are, in the opinion of management, necessary to provide a fair statement of the Company’s financial condition and results of operations for the periods presented. These interim consolidated financial statements are presented in accordance with Accounting Standards Codification 270, “Interim Reporting” and, accordingly, do not include all of the information and note disclosures required by US GAAP for complete financial statements, except for the changes below. The results of operations for the three and six months ended June 30, 2020 are not necessarily indicative of the results to be expected for a full year or for any other periods. The Company has reclassified certain prior year amounts to conform to the current year’s presentation for discontinued operations to reflect the anticipated divestiture of its Foundry Services Group business and Fab 4. The assets to be acquired and liabilities to be transferred to the Buyer, as specified in the BTA, have been classified as assets and liabilities held for sale in the Company’s consolidated balance sheets, subject to adjustments set forth in the BTA. See Note 2 “Discontinued Operations and Assets Held for Sale” for additional information. The consolidated statements of cash flows have not been adjusted to separately disclose cash flows related to discontinued operations, but the material items in the operating and investing activities of cash flows relating to discontinued operations are disclosed in Note 2. Unless otherwise stated, information in these notes to consolidated financial statements relates to the Company’s continuing operations and excludes the discontinued operations. There have been no material changes to the Company’s significant accounting policies as of and for the three and six months ended June 30, 2020, except for those related to discontinued operations and assets held for sale as described below, as compared to the significant accounting policies described in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2019. Discontinued Operations and Assets Held for Sale The Company reports the results of operations of a business as discontinued operations if a disposal represents a strategic shift that has or will have a major effect on the Company’s operations and financial results when the business is sold and classified as held for sale, in accordance with the criteria of Accounting Standard Codification (“ASC”) 205, “Presentation of Financial Statements” (“ASC 205”) and ASC 360, “Property, Plant and Equipment” (“ASC 360”). Assets and liabilities of a business classified as held for sale are recorded at the lower of its carrying amount or estimated fair value less costs to sell , and depreciation and amortization ceases on the date that the held for sale criteria are met. If the carrying amount of the business exceeds its estimated fair value less costs to sell, a loss is recognized. Assets and liabilities related to discontinued operations classified as held for sale are segregated in the current and prior balance sheets in the period in which the business is classified as held for sale. The results of discontinued operations are reported in “Income (loss) from discontinued operations, net of tax” in the accompanying consolidated statements of operations for the current and prior periods commencing in the period in which the business meets the criteria. Recent Accounting Pronouncements Not Yet Adopted In December 2019, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update No. 2019-12, “Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes” (“ASU 2019-12”). ASU 2019-12 removes certain exceptions to the general principles in Topic 740 and improves consistent application of and simplifies GAAP for other areas of Topic 740 by clarifying and amending existing guidance. ASU 2019-12 is effective for fiscal years beginning after December 15, 2020, and interim periods within those fiscal years. The Company does not expect the adoption of ASU 2019-12 to have a material effect on the Company’s consolidated financial statements. Recently Adopted Accounting Pronouncements In June 2016, the FASB issued Accounting Standards Update No. 2016-13, “Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” (“ASU 2016-13”). ASU 2016-13 amends the impairment model by requiring entities to use a forward-looking approach based on expected losses to estimate credit losses on certain types of financial instruments, including trade receivables. In April 2019, the FASB issued Accounting Standards Update No. 2019-04, “Codification Improvements to Topic 326, Financial Instruments—Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments” (“ASU 2019-04”), and in November 2019, the FASB issued Accounting Standards Update No. 2019-11, “Codification Improvements to Topic 326, Financial Instruments—Credit Losses” (“ASU 2019-11”) to clarify and address certain items related to the amendments in ASU 2016-13. In February 2020, the FASB issued Accounting Standards Update No. 2020-02, “Financial Instruments—Credit Losses (Topic 326)” (“ASU 2020-02”), which incorporates SEC SAB 119 (updated from SAB 102) into the ASC by aligning SEC recommended policies and procedures with ASC 326.The Company adopted ASU 2016-13, ASU 2019-04, ASU 2019-11 and ASU 2020-02 as of January 1, 2020, and the adoption did not have a material impact on the Company’s consolidated financial statements. In August 2018, the FASB issued Accounting Standards Update No. 2018-13 “Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement” (“ASU 2018-13”). ASU 2018-13 amends existing fair value measurement disclosure requirements by adding, changing, or removing certain disclosures. The Company adopted ASU 2018-13 as of January 1, 2020, and the adoption of ASU 2018-13 did not impact the Company’s consolidated financial statements.

Discontinued Operations and Assets Held for Sale

6 Months Ended

Jun. 30, 2020

Discontinued Operations and Assets Held for Sale [Abstract]

Discontinued Operations and Assets Held for Sale

2. Discontinued Operations and Assets Held for Sale

On March 30, 2020, the Company entered into the BTA for the sale of its Foundry Services Group business and Fab 4. Following the consummation of the sale, and for up to three years, the Company is expected to provide the Transitional Fab 3 Foundry Services. For the periods prior to the closing of the sale, revenue from providing the Transitional Fab 3 Foundry Services to the Foundry Services Group is recorded at cost on both of the continuing and discontinued businesses. The sale is expected to close

in the third quarter of

2020, subject to customary closing conditions.

The following table summarizes the results from discontinued operations, net of tax, for the three and six months ended June 30, 2020 and 2019.


	Three Months Ended						Six Months Ended
	June 30, 2020			June 30, 2019			June 30, 2020			June 30, 2019
	(In thousands of US dollars, except share data)
Revenues:
Net sales – Foundry Services Group	$	95,779		$	73,139		$	182,058		$	130,255
Net sales – transitional Fab 3 foundry services		(9,873	)		(8,879	)		(19,610	)		(15,882	)

Total revenues		85,906			64,260			162,448			114,373
Cost of sales:
Cost of sales – Foundry Services Group		64,869			60,921			130,452			114,359
Cost of sales – transitional Fab 3 foundry services		(9,873	)		(8,879	)		(19,610	)		(15,882	)

Total cost of sales		54,996			52,042			110,842			98,477

Gross profit		30,910			12,218			51,606			15,896
Operating expenses:
Selling, general and administrative expenses		4,992			5,880			10,636			11,914
Research and development expenses		6,915			7,217			14,318			15,191
Restructuring and other charges		589			1,130			2,704			4,024

Total operating expenses		12,496			14,227			27,658			31,129

Operating income (loss) from discontinued operations		18,414			(2,009	)		23,948			(15,233	)

Foreign currency gain (loss), net		(23	)		1,140			2,074			1,753
Others, net		(59	)		(135	)		48			(49	)

Income (loss) from discontinued operations before income tax expense		18,332			(1,004	)		26,070			(13,529	)
Income tax expense		935			26			1,344			71

Income (loss) from discontinued operations, net of tax		17,397			(1,030	)		24,726			(13,600	)

For the three months ended June 30, 2020 and 2019, the Company recorded $589 thousand and $1,130 thousand

, respectively,

and for the six months ended June 30, 2020 and 2019, the Company recorded $2,704 thousand and $1,873 thousand, respectively, in professional fees incurred in connection with the Foundry Services Group business and Fab 4, and recorded such costs as restructuring and other charges in the above. For the six months ended June 30, 2019, the Company also recorded in the same line a $2,151 thousand restructuring-related charge to its fab employees.

The following table provides a reconciliation of the aggregate carrying amounts of major classes of assets and liabilities relating to the Foundry Services Group business and Fab 4, which are included in assets and liabilities held for sale in the accompanying consolidated balance sheets for each of the periods presented:


	June 30, 2020		December 31, 2019
	(In thousands of US dollars)
Assets
Current assets
Accounts receivable, net	$	42,789	$	48,194
Unbilled accounts receivable		5,936		16,463
Inventories, net		36,602		31,863
Other current assets		2,933		3,301
Other assets of the disposal group classified as held for sale		683		—

Total current assets held for sale	$	88,943	$	99,821

Property, plant and equipment, net		103,887		109,506
Intangible assets, net		1,350		1,245
Other non-current assets		10,906		12,683

Total assets held for sale	$	205,086	$	223,255

Liabilities
Current liabilities
Accounts payable	$	21,530	$	20,503
Other current liabilities		14,266		16,537

Total current liabilities held for sale	$	35,796	$	37,040

Accrued severance benefits, net		97,485		95,547
Other non-current liabilities		13,288		15,334

Total liabilities held for sale	$	146,569	$	147,921

As of June 30, 2020, all assets and liabilities held for sale are classified as current on the consolidated balance sheets based on the anticipated date of disposal of the Foundry Services Group business and Fab 4.

The following table provides supplemental cash flows information related to discontinued operations:


	Six Months Ended
	June 30, 2020			June 30, 2019
	(In thousands of US dollars)
Significant non-cash operating activities:
Depreciation and amortization	$	5,365		$	11,403
Provision for severance benefits		6,405			3,763
Stock-based compensation		263			210
Investing activities:
Capital expenditures	$	(4,415	)	$	(8,262	)

Sales of Accounts Receivable and Receivable Discount Program	6 Months Ended
	Jun. 30, 2020
Receivables [Abstract]
Sales of Accounts Receivable and Receivable Discount Program	3. Sales of Accounts Receivable and Receivable Discount Program The Company has entered into an agreement to sell selected trade accounts receivable to a financial institution from time to time since March 2012. After the sale, the Company does not retain any interest in the receivables and the applicable financial institution collects these accounts receivable directly from the customer. There was no sale of these accounts receivable for the six months ended June 30, 2020. For the six months ended June 30, 2019, the proceeds from the sales of these accounts receivable totaled $13,637 thousand and these sales resulted in pre-tax losses of $42 thousand, which are included in selling, general and administrative expenses in the consolidated statements of operations. Net proceeds of this accounts receivable sale program are recognized in the consolidated statements of cash flows as part of operating cash flows. The Company uses receivable discount programs with certain customers. These discount arrangements allow the Company to accelerate collection of customers’ receivables.

Inventories

6 Months Ended

Jun. 30, 2020

Inventory Disclosure [Abstract]

Inventories

4. Inventories

Inventories as of June 30, 2020 and December 31, 2019 consist of the following (in thousands):


	June 30, 2020			December 31, 2019
Finished goods	$	11,252		$	10,087
Semi-finished goods and work-in-process		32,196			28,815
Raw materials		6,627			8,449
Materials in-transit		743			—
Less: inventory reserve		(5,307	)		(5,947	)

Inventories, net	$	45,511		$	41,404

Changes in inventory reserve for the three and six months ended June 30, 2020 and 2019 are as follows (in thousands):


	Three Months Ended			Six Months Ended			Three Months Ended			Six Months Ended
	June 30, 2020						June 30, 2019
Beginning balance	$	(4,807	)	$	(5,947	)	$	(8,690	)	$	(4,845	)
Change in reserve
Inventory reserve charged to costs of sales		(1,794	)		(3,069	)		(4,374	)		(9,447	)
Sale of previously reserved inventory		747			1,653			490			966

		(1,047	)		(1,416	)		(3,884	)		(8,481	)
Write off		642			1,141			624			1,216
Translation adjustments		(95	)		221			168			328
Reclassified to assets held for sale		—			694			—			—

Ending balance	$	(5,307	)	$	(5,307	)	$	(11,782	)	$	(11,782	)

Inventory reserve represents the Company’s best estimate in value lost due to excessive inventory level, physical deterioration, obsolescence, changes in price levels, or other causes based on individual facts and circumstances. Inventory reserve relates to inventory items including finished goods, semi-finished goods,

work-in-process

and raw materials. Write off of this reserve is recognized only when the related inventory has been disposed or scrapped.

Property, Plant and Equipment

6 Months Ended

Jun. 30, 2020

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

5. Property, Plant and Equipment

Property, plant and equipment as of June 30, 2020 and December 31, 2019 are comprised of the following (in thousands):


	June 30, 2020			December 31, 2019
Buildings and related structures	$	21,938		$	22,502
Machinery and equipment		87,505			89,453
Finance lease right-of-use assets		312			323
Others		23,360			22,242

		133,115			134,520
Less: accumulated depreciation		(77,747	)		(75,704	)
Land		13,742			14,252

Property, plant and equipment, net	$	69,110		$	73,068

Aggregate depreciation expenses totaled $4,794 thousand and $4,815 thousand for the six months ended June 30, 2020 and 2019, respectively.

Concurrent with the execution of the BTA, the Company executed a factory (kun) mortgage agreement under which the real property owned by the Company in respect of the Fab 3 fabrication facility located in Gumi, Korea and other material assets located in, attached to or forming part of such facility were pledged as collateral for purposes of securing the payment of its termination fee of $34,470 thousand under the BTA. The Company has a right to replace the factory (kun) mortgage at any time with a deposit of $34,470 thousand cash into escrow.

Intangible Assets

6 Months Ended

Jun. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

6. Intangible Assets

Intangible assets as of June 30, 2020 and December 31, 2019 are comprised of the following (in thousands):


	June 30, 2020
	Gross amount		Accumulated amortization			Net amount
Technology	$	6,340	$	(6,340	)	$	—
Customer relationships		9,816		(9,816	)		—
Intellectual property assets		8,555		(5,965	)		2,590

Intangible assets, net	$	24,711	$	(22,121	)	$	2,590


	December 31, 2019
	Gross amount		Accumulated amortization			Net amount
Technology	$	6,575	$	(6,575	)	$	—
Customer relationships		10,180		(10,180	)		—
Intellectual property assets		8,637		(5,868	)		2,769

Intangible assets, net	$	25,392	$	(22,623	)	$	2,769

Aggregate amortization expenses for intangible assets totaled $320 thousand and $287 thousand for the six months ended June 30, 2020 and 2019, respectively.

Leases

6 Months Ended

Jun. 30, 2020

Leases [Abstract]

Leases

7. Leases

The Company has operating and finance leases for buildings and other assets such as vehicles and office equipment. The Company’s leases have remaining lease terms ranging from 1 year to 4 years.

The tables below present financial information related to the Company’s leases.

The Company adopted the new lease accounting standard as of January 1, 2019, using the modified retrospective transition method. The tables below present financial information related to the Company’s leases

Supplemental balance sheets information related to leases as of June 30, 2020 and December 31, 2019 are as follows (in thousands):


Leases	Classification	June 30, 2020		December 31, 2019
Assets
Operating lease	Operating lease right-of-use assets	$	1,182	$	1,876
Finance lease	Property, plant and equipment, net		218		258

Total lease assets		$	1,400	$	2,134

Liabilities
Current
Operating	Operating lease liabilities	$	1,053	$	1,625
Finance	Other current liabilities		60		60
Non-current
Operating	Other non-current liabilities		129		251
Finance	Other non-current liabilities		170		208

Total lease liabilities		$	1,412	$	2,144

The following table presents the weighted average remaining lease term and discount rate:


	June 30, 2020			December 31, 2019
Weighted average remaining lease term
Operating leases		1.0 years			1.1 years
Finance leases		3.5 years			4.0 years
Weighted average discount rate
Operating leases		7.01	%		7.19	%
Finance leases		7.75	%		7.75	%

The components of lease cost included in the Company’s consolidated statements of operations, are as follows (in thousands):


	Three Months Ended				Six Months Ended
	June 30, 2020		June 30, 2019		June 30, 2020		June 30, 2019
Operating lease cost	$	461	$	501	$	929	$	1,026
Finance lease cost
Amortization of right-of-use assets		15		16		31		33
Interest on lease liabilities		4		6		9		12

Total lease cost	$	480	$	523	$	969	$	1,071

The above table does not include an immaterial cost of short-term leases for the three and six months ended June 30, 2020 and 2019.

Other lease information is as follows (in thousands):


	Three Months Ended				Six Months Ended
	June 30, 2020		June 30, 2019		June 30, 2020		June 30, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$	461	$	501	$	929	$	1,026
Operating cash flows from finance leases		4		6		9		12
Financing cash flows from finance leases		14		14		28		28

The aggregate future lease payments for operating and finance leases as of June 30, 2020 are as follows (in thousands):


	Operating Leases			Finance Leases
2020	$	820		$	37
2021		335			75
2022		58			75
2023		14			75
Thereafter		—			—

Total future lease payments		1,227			262
Less: Imputed interest		(45	)		(32	)

Present value of future payments	$	1,182		$	230

Accrued Expenses

6 Months Ended

Jun. 30, 2020

Payables and Accruals [Abstract]

Accrued Expenses

8. Accrued Expenses

Accrued expenses as of June 30, 2020 and December 31, 2019 are comprised of the following (in thousands):


	June 30, 2020		December 31, 2019
Payroll, benefits and related taxes, excluding severance benefits	$	10,165	$	8,493
Withholding tax attributable to intercompany interest income		24,457		23,371
Interest on senior notes		8,205		8,205
Outside service fees		922		1,996
Others		1,986		2,734

Accrued expenses	$	45,735	$	44,799

Derivative Financial Instruments

6 Months Ended

Jun. 30, 2020

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

9. Derivative Financial Instruments

The Company’s Korean subsidiary from time to time has entered into zero cost collar and forward contracts to hedge the risk of changes in the functional-currency-equivalent cash flows attributable to currency rate changes on US dollar denominated revenues.

Details of derivative contracts as of June 30, 2020 are as follows (in thousands):

Date of transaction

Type of derivative

Total notional amount

Month of settlement

December 4, 2019

Zero cost collar

30,000

July 2020 to December 2020

January 31, 2020

Zero cost collar

30,000

July 2020 to December 2020

February 3, 2020

Zero cost collar

18,000

July 2020 to December 2020

February 21, 2020

Zero cost collar

30,000

July 2020 to December 2020

Details of derivative contracts as of December 31, 2019 are as follows (in thousands):

Date of transaction

Type of derivative

Total notional amount

Month of settlement

August 13, 2019

Zero cost collar

60,000

January 2020 to June 2020

September 27, 2019

Zero cost collar

42,000

January 2020 to June 2020

December 4, 2019

Zero cost collar

30,000

July 2020 to December 2020

The zero cost collar contracts qualify as cash flow hedges under ASC 815, “Derivatives and Hedging,” since at both the inception of the contracts and on an ongoing basis, the hedging relationship was and is expected to be highly effective in achieving offsetting cash flows attributable to the hedged risk during the term of the contracts.

The fair values of the Company’s outstanding zero cost collar contracts recorded as assets and liabilities as of June 30, 2020 and December 31, 2019 are as follows (in thousands):


Derivatives designated as hedging instruments:		June 30, 2020		December 31, 2019
Asset Derivatives:
Zero cost collars	Other current assets	$	—	$	1,456
Liability Derivatives:
Zero cost collars	Other current liabilities	$	1,188	$	—

Offsetting of derivative liabilities as of June 30, 2020 is as follows (in thousands):


As of June 30, 2020	Gross amounts of recognized liabilities		Gross amounts offset in the balance sheets		Net amounts of liabilities presented in the balance sheets		Gross amounts not offset in the balance sheets					Net amount
As of June 30, 2020	Gross amounts of recognized liabilities		Gross amounts offset in the balance sheets		Net amounts of liabilities presented in the balance sheets		Financial instruments		Cash collateral pledged			Net amount
Liability Derivatives:
Zero cost collars	$	1,188	$	—	$	1,188	$	—	$	(1,190	)	$	(2	)

Offsetting of derivative assets as of December 31, 2019 is as follows (in thousands):


As of December 31, 2019	Gross amounts of recognized assets		Gross amounts offset in the balance sheets		Net amounts of assets presented in the balance sheets		Gross amounts not offset in the balance sheets				Net amount
As of December 31, 2019	Gross amounts of recognized assets		Gross amounts offset in the balance sheets		Net amounts of assets presented in the balance sheets		Financial instruments		Cash collateral pledged		Net amount
Asset Derivatives:
Zero cost collars	$	1,456	$	—	$	1,456	$	—	$	1,070	$	2,526

For derivative instruments that are designated and qualify as cash flow hedges, gains or losses on the derivative aside from components excluded from the assessment of effectiveness are reported as a component of accumulated other comprehensive income (“AOCI”) and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. Gains and losses on the derivative, representing hedge components excluded from the assessment of effectiveness, are recognized in current earnings.

The following table summarizes the impact of derivative instruments on the consolidated statements of operations for the three months ended June 30, 2020 and 2019 (in thousands):


Derivatives in ASC 815 Cash Flow Hedging Relationships	Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)					Location/Amount of Loss Reclassified from AOCI Into Statement of Operations (Effective Portion)								Location/Amount of Gain (Loss) Recognized in Statement of Operations on Derivatives (Ineffective Portion)
	Three Months Ended June 30,							Three Months Ended June 30,								Three Months Ended June 30,
	2020		2019					2020			2019					2020		2019
Zero cost collars	$	2,204	$	(1,136	)		Net sales	$	(193	)	$	(203	)		Other income, net	$	55	$	(11	)
Forwards	$	—	$	(1,363	)		Net sales	$	—		$	(1,661	)		Other income, net	$	—	$	(69	)

	$	2,204	$	(2,499	)			$	(193	)	$	(1,864	)			$	55	$	(80	)

The following table summarizes the impact of derivative instruments on the consolidated statements of operations for the six months ended June 30, 2020 and 2019 (in thousands):


Derivatives in ASC 815 Cash Flow Hedging Relationships	Amount of Loss Recognized in AOCI on Derivatives (Effective Portion)						Location/Amount of Loss Reclassified from AOCI Into Statement of Operations (Effective Portion)								Location/Amount of Gain (Loss) Recognized in Statement of Operations on Derivatives (Ineffective Portion)
	Six Months Ended June 30,								Six Months Ended June 30,								Six Months Ended June 30,
	2020			2019					2020			2019					2020		2019
Zero cost collars	$	(2,800	)	$	(1,102	)		Net sales	$	(251	)	$	(203	)		Other income, net	$	172	$	(11	)
Forwards	$	—		$	(1,798	)		Net sales	$	—		$	(1,750	)		Other income, net	$	—	$	(125	)

	$	(2,800	)	$	(2,900	)			$	(251	)	$	(1,953	)			$	172	$	(136	)

As of June 30, 2020, the amount expected to be reclassified from accumulated other comprehensive income into loss within the next twelve months is $1,004 thousand.

The Company set aside $10,550 thousand and $8,750 thousand of cash deposits to the counterparties, Nomura Financial Investment (Korea) Co., Ltd. (“NFIK”) and Deutsche Bank AG, Seoul Branch (“DB”), as required for the zero cost collar contracts outstanding as of June 30, 2020 and December 31, 2019, respectively. These cash deposits are recorded as hedge collateral on the consolidated balance sheets.

The Company is required to deposit additional cash collateral with NFIK and DB for any exposure in excess of $500 thousand, and $1,190 thousand and $1,070 thousand of additional cash collateral were required and recorded as hedge collateral on the consolidated balance sheets as of June 30, 2020 and December 31, 2019, respectively.

These

forward and zero

cost collar contracts may be terminated by the counterparty in a number of circumstances, including if the Company’s borrowing rating falls below

B-/B3

or if the Company’s total cash and cash equivalents is less than $30,000 thousand at the end of a fiscal quarter, unless a waiver is obtained from the counterparty.

Fair Value Measurements

6 Months Ended

Jun. 30, 2020

Fair Value Disclosures [Abstract]

Fair Value Measurements

10. Fair Value Measurements

Fair Value of Financial Instruments

As of June 30, 2020, the following table represents the Company’s liabilities measured at fair value on a recurring basis and the basis for that measurement (in thousands):


	Carrying Value June 30, 2020		Fair Value Measurement June 30, 2020		Quoted Prices in Active Markets for Identical liability (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Liabilities:
Derivative liabilities (other current liabilities)	$	1,188	$	1,188		—	$	1,188		—

As of December 31, 2019, the following table represents the Company’s assets measured at fair value on a recurring basis and the basis for that measurement (in thousands):


	Carrying Value December 31, 2019		Fair Value Measurement December 31, 2019		Quoted Prices in Active Markets for Identical Asset (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Derivative assets (other current assets)	$	1,456	$	1,456		—	$	1,456		—

Items not reflected in the table above include cash equivalents, accounts receivable, other receivables, accounts payable, and other accounts payable, fair value of which approximate carrying values due to the short-term nature of these instruments. The fair value of assets and liabilities whose carrying value approximates fair value is determined using Level 2 inputs.

Fair Value of Borrowings


	June 30, 2020				December 31, 2019
	Carrying Value		Fair Value		Carrying Value		Fair Value
	(In thousands of US dollars)
Borrowings:
5.0% Exchangeable Senior Notes due March 2021 (Level 2)	$	82,706	$	103,838	$	81,959	$	116,078
6.625% Senior Notes due July 2021 (Level 2)	$	223,242	$	218,644	$	222,784	$	224,250

On January 17, 2017, the Company’s wholly-owned subsidiary, MagnaChip Semiconductor S.A., closed an offering (the “Exchangeable Notes Offering”) of 5.0% Exchangeable Senior Notes due March 1, 2021 (the “Exchangeable Notes”), of $86,250 thousand, which represents the principal amount, excluding $5,902 thousand of debt issuance costs. In December 2018 and February 2019, MagnaChip Semiconductor S.A. repurchased a principal amount equal to $1,590 thousand and $920 thousand, respectively, of the Exchangeable Notes in the open market. The Company estimates the fair value of the Exchangeable Notes using the market approach, which utilizes quoted market prices that fall under Level 2. For further description of the Exchangeable Notes, see Note 11, “Borrowings.”

On July 18, 2013, the Company issued 6.625% Senior Notes due July 15, 2021 (the “2021 Notes”) of $225,000 thousand, which represents the principal amount, excluding $1,125 thousand of original issue discount and $5,039 thousand of debt issuance costs. In December 2018 and January 2019, the Company repurchased a principal amount equal to $500 thousand and $250 thousand, respectively, of the 2021 Notes in the open market. The Company estimates the fair value of the 2021 Notes using the market approach, which utilizes quoted market prices that fall under Level 2. For further description of the 2021 Notes, see Note 11, “Borrowings.”

Fair Values Measured on a

Non-recurring

Basis

The Company’s

non-financial

assets, such as property, plant and equipment, and intangible assets are recorded at fair value upon acquisition and are remeasured at fair value only if an impairment charge is recognized. As of June 30, 2020 and 2019, the Company did not have any assets or liabilities measured at fair value on a

non-recurring

basis.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Borrowings

6 Months Ended

Jun. 30, 2020

Debt Disclosure [Abstract]

Long-term Borrowings

11. Borrowings

Borrowings as of June 30, 2020 and December 31, 2019 are as follows (in thousands):


	June 30, 2020			December 31, 2019
5.0% Exchangeable Senior Notes due March 2021	$	83,740		$	83,740
6.625% Senior Notes due July 2021		224,250			224,250
Less: unamortized discount and debt issuance costs		(2,042	)		(3,247	)

Total borrowings, net		305,948			304,743
Less: current portion of long-term borrowings, net		(82,706	)		—

Long-term borrowings, net	$	223,242		$	304,743

5.0% Exchangeable Senior Notes

On January 17, 2017, MagnaChip Semiconductor S.A. closed the Exchangeable Notes Offering of $86,250 thousand aggregate principal amount of 5.0% Exchangeable Notes. Interest on the Exchangeable Notes accrues at a rate of 5.0% per annum, payable semi-annually on March 1 and September 1 of each year, beginning on March 1, 2017. The Exchangeable Notes will mature on March 1, 2021, unless earlier repurchased or converted. Holders may convert their notes at their option at any time prior to the close of business on the business day immediately preceding the stated maturity date.

The Company used a portion of the net proceeds from the issuance to repurchase 1,795,444 shares of common stock under its stock repurchase program at an aggregate cost of $11,401 thousand.

Upon conversion, the Company will deliver for each $1,000 principal amount of converted notes a number of shares equally to the exchange rate, which will initially be 121.1387 shares of common stock per $1,000 principal amount of Exchangeable Notes, equivalent to an initial exchange price of approximately $8.26 per share of common stock. The exchange rate will be subject to adjustment in some circumstances, but will not be adjusted for any accrued and unpaid interest. In addition, if a “make-whole fundamental change” (as defined in the Exchangeable Notes indenture (the “Exchangeable Notes Indenture”)) occurs prior to the stated maturity date, the Company will increase the exchange rate for a holder who elects to convert its notes in connection with such make-whole fundamental change in certain circumstances. MagnaChip Semiconductor S.A. may also, under certain circumstances, be required to pay additional amounts to holders of Exchangeable Notes if withholding or deduction is required in a relevant tax jurisdiction.

If the Company undergoes a fundamental change, subject to certain conditions, holders may require the Company to repurchase for cash all or part of their notes at a purchase price equal to 100% of the principal amount of the notes to be repurchased, plus accrued and unpaid interest to, but excluding, the fundamental change purchase date. In addition, upon certain events of default described in the Exchangeable Notes Indenture, the trustee or holders of at least 25% principal amount of the Exchangeable Notes may declare 100% of the then outstanding Exchangeable Notes due and payable in full, together with all accrued and unpaid interest thereon. Payment of principal on the Exchangeable Notes may also accelerate and become automatically due and payable upon certain events of default involving bankruptcy or insolvency proceedings involving the Company, MagnaChip Semiconductor S.A. and their significant subsidiaries. The Exchangeable Notes are not redeemable at the option of MagnaChip Semiconductor S.A. prior to the maturity date.

The Exchangeable Notes Indenture contains covenants that limit the ability of the Company, MagnaChip Semiconductor S.A. and the Company’s other restricted subsidiaries to: (i) declare or pay any dividend or make any payment or distribution on account of or purchase or redeem the Company’s capital stock or equity interests of the restricted subsidiaries; (ii) make any principal payment on, or redeem or repurchase, prior to any scheduled repayment or maturity, any subordinated indebtedness; (iii) make certain investments; (iv) incur additional indebtedness and issue certain types of capital stock; (v) create or incur any lien (except for permitted liens) that secures obligations under any indebtedness; (vi) merge with or into or sell all or substantially all of the Company’s assets to other companies; (vii) enter into certain types of transactions with affiliates; (viii) guarantee the payment of any indebtedness; and (ix) designate unrestricted subsidiaries.

These covenants are subject to a number of exceptions and qualifications. Certain of these restrictive covenants will terminate if the Exchangeable Notes are rated investment grade at any time.

The Company incurred debt issuance costs of $5,902 thousand related to the issuance of the Exchangeable Notes. The debt issuance costs are recorded as a direct deduction from the long-term borrowings in the consolidated balance sheets and amortized to interest expense using the effective interest method over the term of the Exchangeable Notes. Interest expense related to the Exchangeable Notes for the three and six months ended June 30, 2020 were $1,425 thousand and $2,841 thousand, respectively. Interest expense related to the Exchangeable Notes for the three and six months ended June 30, 2019 were $1,394 thousand and $2,802 thousand, respectively.

In December 2018, the Company repurchased a principal amount equal to $1,590 thousand of the Exchangeable Notes in the open market, resulting in a loss of $234 thousand, which was recorded as loss on early extinguishment of long-term borrowings, net in the consolidated statements of operations for the year ended December 31, 2018. In February 2019, the Company repurchased a principal amount equal to $920 thousand of the Exchangeable Notes in the open market, resulting in a loss of $63 thousand, which was recorded as loss on early extinguishment of long-term borrowings, net in the consolidated statements of operations for the year ended December 31, 2019.

6.625% Senior Notes

On July 18, 2013, the Company issued a $225,000,000 aggregate principal amount of the 2021 Notes at a price of 99.5%. Interest on the 2021 Notes accrues at a rate of 6.625% per annum, payable semi-annually on January 15 and July 15 of each year, beginning on January 15, 2014.

On or after July 15, 2019, the Company can optionally redeem all or a part of the 2021 Notes at a redemption price equal to 100% of the principal amount of the notes plus accrued and unpaid interest and special interest, if any, on the notes redeemed, to the applicable date of redemption.

The Indenture relating to the 2021 Notes contains covenants that limit the ability of the Company and its restricted subsidiaries to: (i) declare or pay any dividend or make any payment or distribution on account of or purchase or redeem the Company’s capital stock or equity interests of the restricted subsidiaries; (ii) make any principal payment on, or redeem or repurchase, prior to any scheduled repayment or maturity, any subordinated indebtedness; (iii) make certain investments; (iv) incur additional indebtedness and issue certain types of capital stock; (v) create or incur any lien (except for permitted liens) that secures obligations under any indebtedness; (vi) merge with or into or sell all or substantially all of the Company’s assets to other companies; (vii) enter into certain types of transactions with affiliates; (viii) guarantee the payment of any indebtedness; (ix) enter into sale-leaseback transactions; (x) enter into agreements that would restrict the ability of the restricted subsidiaries to make distributions with respect to their equity to the Company or other restricted subsidiaries, to make loans to the Company or other restricted subsidiaries or to transfer assets to the Company or other restricted subsidiaries; and (xi) designate unrestricted subsidiaries.

These covenants are subject to a number of exceptions and qualifications. Certain of these restrictive covenants will terminate if the 2021 Notes are rated investment grade at any time.

The Company incurred original issue discount of $1,125 thousand and debt issuance costs of $5,039 thousand related to the issuance of the 2021 Notes. The original issue discount and the debt issuance costs are recorded as a direct deduction from the long-term borrowings in the consolidated balance sheets and amortized to interest expense using the effective interest method over the term of the 2021 Notes. Interest expense related to the 2021 Notes for the three and six months ended June 30, 2020 were $3,944 thousand and $7,887 thousand, respectively. Interest expenses related to the 2021 Notes for the three and six months ended June 30, 2019 were $3,929 thousand and $7,859 thousand, respectively.

In December 2018, the Company repurchased a principal amount equal to $500 thousand of the 2021 Notes in the open market, resulting in a net gain of $28 thousand, which was recorded as loss on early extinguishment of long-term borrowings, net in the consolidated statements of operations for the year ended December 31, 2018. In January 2019, the Company repurchased a principal amount equal to $250 thousand of the 2021 Notes in the open market, resulting in a net gain of $21 thousand, which was recorded as loss on early extinguishment of long-term borrowings, net in the consolidated statements of operations for the year ended December 31, 2019.

Accrued Severance Benefits

6 Months Ended

Jun. 30, 2020

Postemployment Benefits [Abstract]

Accrued Severance Benefits

12. Accrued Severance Benefits

The majority of accrued severance benefits are for employees in the Company’s Korean subsidiary. Pursuant to the Employee Retirement Benefit Security Act of Korea, eligible employees and executive officers with one or more years of service are entitled to severance benefits upon the termination of their employment based on their length of service and rate of pay. As of June 30, 2020, 98% of all employees of the Company were eligible for severance benefits.

Changes in accrued severance benefits are as follows (in thousands):


	Three Months Ended			Six Months Ended			Three Months Ended			Six Months Ended
	June 30, 2020						June 30, 2019
Beginning balance	$	50,610		$	53,344		$	54,553		$	55,691
Provisions		1,755			3,774			1,329			2,643
Severance payments		(1,502	)		(3,454	)		(1,799	)		(3,295	)
Translation adjustments		922			(1,879	)		(881	)		(1,837	)

		51,785			51,785			53,202			53,202
Less: Cumulative contributions to severance insurance deposit accounts		(1,570	)		(1,570	)		(1,099	)		(1,099	)
The National Pension Fund		(73	)		(73	)		(84	)		(84	)
Group severance insurance plan		(215	)		(215	)		(236	)		(236	)

Accrued severance benefits, net	$	49,927		$	49,927		$	51,783		$	51,783

The severance benefits funded through the Company’s National Pension Fund and group severance insurance plan will be used exclusively for payment of severance benefits to eligible employees. These amounts have been deducted from the accrued severance benefit balance.

In July 2018, the Company began contributing to certain severance insurance deposit accounts a certain percentage of severance benefits that are accrued for eligible employees for their services from January 1, 2018. These accounts consist of time deposits and other guaranteed principal and interest, and are maintained at insurance companies, banks or security companies for the benefit of employees. The Company deducts the contributions made to these severance insurance deposit accounts from its accrued severance benefits.

The Company is liable to pay the following future benefits to its

non-executive

employees upon their normal retirement age (in thousands):


	Severance benefit
Remainder of 2020	$	379
2021		401
2022		741
2023		596
2024		1,178
2025		2,104
2026 – 2030		19,482

The above amounts were determined based on the

non-executive

employees’ current salary rates and the number of service years that will be accumulated upon their retirement dates. These amounts do not include amounts that might be paid to

non-executive

employees that will cease working with the Company before their normal retirement ages.

Korea’s mandatory retirement age is 60 under the Employment Promotion for the Aged Act.

Foreign Currency Gain (Loss), Net	6 Months Ended
Foreign Currency Gain (Loss), Net	Jun. 30, 2020
Foreign Currency [Abstract]
Foreign Currency Gain (Loss), Net	13. Foreign Currency Gain (Loss), Net Net foreign currency gain or loss includes non-cash translation gain or loss associated with intercompany balances. A substantial portion of the Company’s net foreign currency gain or loss is non-cash translation gain or loss associated with intercompany long-term loans to the Company’s Korean subsidiary. The loans are denominated in US dollars and are affected by changes in the exchange rate between the Korean won and the US dollar. As of June 30, 2020 and December 31, 2019, the outstanding intercompany loan balances including accrued interest between the Korean subsidiary and the Dutch subsidiary were $690,708 thousand and $686,485 thousand, respectively. The Korean won to US dollar exchange rates were 1,200.7:1 and 1,157.8:1 using the first base rate as of June 30, 2020 and December 31, 2019, respectively, as quoted by the KEB Hana Bank.

Income Taxes	6 Months Ended
Income Taxes	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	14 . Income Taxes The Company and its subsidiaries file income tax returns in Korea, Japan, Taiwan, the US and in various other jurisdictions. The Company is subject to income- or non-income tax examinations by tax authorities of these jurisdictions for all open tax years. Income from continuing operations before income tax expense for the three months ended June 30, 2020 was $12,452 thousand and loss from continuing operations before income tax expense for the three months ended June 30, 2019 was $7,704 thousand. For the three months ended June 30 , 2020 and 2019, the Company recorded an income tax expense on continuing operations of $678 thousand and $786 thousand, respectively, primarily attributable to interest on intercompany loan balances. Income tax expense was recorded for the Company’s Korean subsidiary based on the estimated taxable income for the respective periods, combined with its ability to utilize net operating loss carryforwards up to 60% in 2019 and 2020. L oss from continuing operations before income tax expense for the six months ended June 30, 2020 and 2019 were $17,323 thousand and $28,463 thousand, respectively. For the six months ended June 30 , 2020 and 2019, the Company recorded income tax expense on continuing of $1,981 thousand and $1,582 thousand, respectively, primarily attributable to interest on intercompany loan balances. Income tax expense was recorded for the Company’s Korean subsidiary based on the estimated taxable income for the respective periods, combined with its ability to utilize net operating loss carryforwards up to 60% in 2019 and 2020. In July 2020, the U.S. Treasury Department issued final tax regulations related to the foreign-derived intangible income and global intangible low-taxed income (GILTI) provisions, which permits a taxpayer to elect to exclude income subject to a high effective rate of foreign tax from its GILTI inclusion. The Company is currently assessing the potential impact of the final regulations to the Company’s consolidated financial statements.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References + Details

Geographic and Other Information

6 Months Ended

Jun. 30, 2020

Segment Reporting [Abstract]

Geographic and Segment Information

15. Geographic and Other Information

Historically, the Company operated in two reportable segments: Foundry Services Group and Standard Products Group. The Company’s Foundry Services Group provides specialty analog and mixed-signal foundry services mainly for fabless and Integrated Device Manufacturer (“IDM”) semiconductor companies that primarily serve communications, IoT, consumer, industrial and automotive applications. The Company’s Standard Products Group is comprised of two business lines: Display Solutions and Power Solutions. The Company’s Display Solutions products provide panel display solutions to major suppliers of large and small rigid and flexible panel displays, and mobile, automotive applications and home appliances. The Company’s Power Solutions products include discrete and integrated circuit solutions for power management in communications, consumer and industrial applications.

On March 30, 2020, the Company entered into the BTA to sell its Foundry business and Fab 4. The planned divestiture of its Foundry business and Fab 4 allows the Company to strategically shift its operational focus to its standard products business. As a result, the results of the Foundry Services Group were classified as discontinued operations in the Company’s consolidated statements of operations and thus excluded from both continuing operations and segment results for all periods presented. Please see “Item 1. Financial Statements and Supplementary Data—Notes to Consolidated Financial Statements—Note 2. Discontinued Operations and Assets Held for Sale” for additional information on the results of discontinued operations. Accordingly, the Company now has one reportable segment. The Company’s chief operating decision maker is its Chief Executive Officer, who allocates resources and assesses performance of the business and other activities based on gross profit.

The following sets forth information relating to the single continuing operating segment (in thousands):


	Three Months Ended				Six Months Ended
	June 30, 2020		June 30, 2019		June 30, 2020		June 30, 2019
Revenues
Standard products business
Display Solutions	$	69,176	$	84,261	$	146,769	$	142,491
Power Solutions		39,779		47,745		72,922		89,779

Total standard products business		108,955		132,006		219,691		232,270
Transitional Fab 3 foundry services		9,873		8,879		19,610		15,882

Total revenues	$	118,828	$	140,885	$	239,301	$	248,152


	Three Months Ended				Six Months Ended
	June 30, 2020		June 30, 2019		June 30, 2020		June 30, 2019
Gross Profit
Standard products business	$	32,138	$	31,622	$	61,268	$	50,645
Transitional Fab 3 foundry services		—		—		—		—

Total gross profit	$	32,138	$	31,622	$	61,268	$	50,645

The following is a summary of net sales – standard products business (which does not include the Transitional Fab 3 Foundry Services) by geographic region, based on the location to which the products are billed (in thousands):


	Three Months Ended				Six Months Ended
	June 30, 2020		June 30, 2019		June 30, 2020		June 30, 2019
Korea	$	21,957	$	36,559	$	52,774	$	71,205
Asia Pacific (other than Korea)		84,210		93,657		161,752		157,404
U.S.A.		1,461		656		2,170		1,118
Europe		856		881		1,827		2,014
Others		471		253		1,168		529

Total	$	108,955	$	132,006	$	219,691	$	232,270

For the three months ended June 30, 2020 and 2019, of the Company’s net sales – standard products business in Asia Pacific (other than Korea

net sales – standard products business in Greater China (China, Hong Kong and Macau)

represented

82.8

% and

96.9

%, respectively.

For the six months ended June 30, 2020 and 2019, of the Company’s net sales – standard products business in Asia Pacific (other than Korea)

net sales – standard products business in Greater China (China, Hong Kong and Macau) represented 88.8% and 95.8%, respectively.

Net sales from the Company’s top ten largest customers in the standard products business (which does not include the Transitional Fab 3 Foundry Services) accounted for 88% and 91% for the three months ended June 30, 2020 and 2019, respectively, and 89% for

each of

the six months ended June 30, 2020 and 2019

For the three months ended June 30, 2020, the Company had one customer that represented 56.5% of its net sales – standard products business, and for the six months ended June 30, 2020, the Company had two customers that represented 54.7% and 10.7% of its net sales – standard products business.

For the three months ended June 30, 2019, the Company had one customer that represented 54.8% of its net sales – standard products business, and for the six months ended June 30, 2019, the Company had one customer that represented 50.6% of its net sales – standard products business.

As of June 30, 2020 and December 31, 2019, one customer accounted for 48.6% and 43.1% of accounts receivable, net, respectively.

96% of the Company’s property, plant and equipment from continuing operations are located in Korea as of June 30, 2020.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8924-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Accumulated Other Comprehensive Income (Loss)

6 Months Ended

Jun. 30, 2020

Equity [Abstract]

Accumulated Other Comprehensive Income (Loss)

16. Accumulated Other Comprehensive Income (Loss)

Accumulated other comprehensive income (loss) consists of the following as of June 30, 2020 and December 31, 2019, respectively (in thousands):


	June 30, 2020			December 31, 2019
Foreign currency translation adjustments	$	11,503		$	(4,205	)
Derivative adjustments		(1,004	)		1,545

Total	$	10,499		$	(2,660	)

Changes in accumulated other comprehensive income (loss) for the three months ended June 30, 2020 and 2019 are as follows (in thousands):


Three Months Ended June 30, 2020	Foreign currency translation adjustments			Derivative adjustments			Total
Beginning balance	$	18,046		$	(3,401	)	$	14,645

Other comprehensive income (loss) before reclassifications		(6,543	)		2,204			(4,339	)
Amounts reclassified from accumulated other comprehensive loss		—			193			193

Net current-period other comprehensive income (loss)		(6,543	)		2,397			(4,146	)

Ending balance	$	11,503		$	(1,004	)	$	10,499


Three Months Ended June 30, 2019	Foreign currency translation adjustments			Derivative adjustments			Total
Beginning balance	$	(12,757	)	$	(361	)	$	(13,118	)

Other comprehensive income (loss) before reclassifications		7,680			(2,499	)		5,181
Amounts reclassified from accumulated other comprehensive loss		—			1,864			1,864

Net current-period other comprehensive income (loss)		7,680			(635	)		7,045


Three Months Ended June 30, 2020	Foreign currency translation adjustments			Derivative adjustments			Total
Ending balance	$	(5,077	)	$	(996	)	$	(6,073	)

Changes in accumulated other comprehensive income (loss) for the six months ended June 30, 2020 and 2019 are as follows (in thousands):


Six Months Ended June 30, 2020	Foreign currency translation adjustments			Derivative adjustments			Total
Beginning balance	$	(4,205	)	$	1,545		$	(2,660	)

Other comprehensive income (loss) before reclassifications		15,708			(2,800	)		12,908
Amounts reclassified from accumulated other comprehensive loss		—			251			251

Net current-period other comprehensive income (loss)		15,708			(2,549	)		13,159

Ending balance	$	11,503		$	(1,004	)	$	10,499


Six Months Ended June 30, 2019	Foreign currency translation adjustments			Derivative adjustments			Total
Beginning balance	$	(20,061	)	$	(49	)	$	(20,110	)

Other comprehensive income (loss) before reclassifications		14,984			(2,900	)		12,084
Amounts reclassified from accumulated other comprehensive loss		—			1,953			1,953

Net current-period other comprehensive income (loss)		14,984			(947	)		14,037

Ending balance	$	(5,077	)	$	(996	)	$	(6,073	)

There was no income tax impact related to changes in accumulated other comprehensive income (loss) for the three and six months ended June 30, 2020 and 2019 due to net operating loss carry-forwards available to offset taxable income and full allowance for deferred tax assets.

Earnings (Loss) Per Share

6 Months Ended

Jun. 30, 2020

Earnings Per Share [Abstract]

Earnings (Loss) Per Share

17. Earnings (Loss) Per Share

The following table illustrates the computation of basic and diluted earnings (loss) per common share for the three and six months ended June 30, 2020 and 2019:


	Three Months Ended					Six Months Ended
	June 30, 2020		June 30, 2019			June 30, 2020			June 30, 2019
	(In thousands of US dollars, except share data)
Basic earnings (loss) per share
Income (loss) from continuing operations	$	11,774	$	(8,490	)	$	(19,304	)	$	(30,045	)
Income (loss) from discontinued operations, net of tax		17,397		(1,030	)		24,726			(13,600	)

Net income (loss)	$	29,171	$	(9,520	)	$	5,422		$	(43,645	)

Basic weighted average common stock outstanding		35,092,312		34,245,127			34,992,734			34,220,141
Basic earnings (loss) per common share
Continuing operations	$	0.34	$	(0.25	)	$	(0.55	)	$	(0.88	)
Discontinued operations		0.50		(0.03	)		0.71			(0.40	)

Total	$	0.84	$	(0.28	)	$	0.16		$	(1.28	)

Diluted earnings (loss) per share
Income (loss) from continuing operations	$	11,774	$	(8,490	)	$	(19,304	)	$	(30,045	)
Add back: Interest expense on Exchangeable Notes		1,425		—			—			—

Income (loss) from continuing operations allocated to common stockholders	$	13,199	$	(8,490	)	$	(19,304	)	$	(30,045	)
Income (loss) from discontinued operations, net of tax		17,397		(1,030	)		24,726			(13,600	)
Net income (loss) allocated to common stockholders	$	30,596	$	(9,520	)	$	5,422		$	(43,645	)

Basic weighted average common stock outstanding		35,092,312		34,245,127			34,992,734			34,220,141
Net effect of dilutive equity awards		1,237,770		—			—			—
Net effect of assumed conversion of 5.0% Exchangeable Notes to common stock		10,144,155		—			—			—

Diluted weighted average common stock outstanding		46,474,237		34,245,127			34,992,734			34,220,141
Continuing operations	$	0.28	$	(0.25	)	$	(0.55	)	$	(0.88	)
Discontinued operations		0.37		(0.03	)		0.71			(0.40	)

Total	$	0.65	$	(0.28	)	$	0.16		$	(1.28	)

The following outstanding instruments were excluded from the computation of diluted loss per share, as they have an anti-dilutive effect on the calculation:


	Three Months Ended				Six Months Ended
	June 30, 2020		June 30, 2019		June 30, 2020		June 30, 2019
Options		699,167		2,611,832		2,075,494		2,611,832
Restricted Stock Units		—		501,490		1,238,639		501,490

The numbers of shares of potential common stock from the assumed conversion of Exchangeable Notes that were excluded from the computation of diluted loss per share as the anti-dilutive effects were

10,144,155

for each of the six months ended June 30, 2020 and three months ended June 30, 2019 and

10,163,242

for the six months ended June 30, 2019.

Commitments and Contingencies	6 Months Ended
Commitments and Contingencies	Jun. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	18. Commitments and Contingencies Long-term Purchase Agreements and Advances to Suppliers The Company purchases raw materials from a variety of vendors. During the normal course of business, in order to manage manufacturing lead times and help assure adequacy supply, the Company from time to time may enter into multi-year purchase agreements, which specify future quantities and pricing of materials to be supplied by the vendors. The Company reviews the terms of the long-term supply agreements and assesses the need for any accrual for estimated losses, such as lower of cost or net realizable value that will not be recovered by future sales prices. No such accrual was required as of June 30, 2020 and December 31, 2019, respectively. The Company, from time to time, may make advances in form of prepayments or deposits to suppliers to procure materials to meet its planned production. The Company recorded advances of $5,419 thousand and $6,593 thousand as other current assets as of June 30, 2020 and December 31, 2019, respectively. COVID-19 Pandemic In December 2019, a strain of coronavirus causing a disease known as COVID-19 surfaced in Wuhan, China, resulting in significant disruptions among Chinese manufacturing and other facilities and travel throughout China. In March 2020, the World Health Organization declared the COVID-19 outbreak a pandemic, which continues to spread rapidly in the U.S. and other countries throughout the world. Governmental authorities throughout the world have implemented numerous containment measures, including travel bans and restrictions, quarantines, shelter-in-place orders, and business restrictions and shutdowns, resulting in rapidly changing market and economic conditions. While the Company experienced some minor disruption in its Power Solutions business from assembly and test subcontractors located in China in the first quarter of 2020 as a result of COVID-19, to date its external Display Solutions business contractors and sub-contractors have not been materially impacted by the outbreak. Nevertheless, while the future impact on the Company’s business from the COVID-19 pandemic is currently difficult to assess, the significant global macro-economic disruption will adversely affect customer demand for some of its products in the near term. The Company is, however, unable to accurately predict the full impact COVID-19 will have on its future results of operations due to numerous uncertainties, including the severity of the disease, the duration of the outbreak, a potential future recurrence of the outbreak, further containment actions that may be taken by governmental authorities, the impact to the businesses of its customers and suppliers, and other factors. The Company continues to closely monitor and evaluate the nature and scope of the impact on COVID-19 to its business, consolidated results of operations, and financial condition, and may take further actions altering its business operations and managing its costs and liquidity that the Company deems necessary or appropriate to respond to this fast moving and uncertain global health crisis and the resulting global economic consequences.

Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2020
Subsequent Events [Abstract]
Subsequent Events	19. Subsequent Events Derivative contracts In July 2020, the Company and NFIK entered into derivative contracts of zero cost collars for the period from January 2021 to June 2021. The total notional amounts are $30,000 thousand. A power outage On July 20, 2020, the Company’s Fab 3 facility in Gumi, South Korea experienced a temporary power outage for approximately 9 hours and 15 minutes. The accident caused certain damage to the Company’s work in process wafers with an estimated total cost of up to approximately $2.3 million. Management is currently evaluating potential insurance and other claims that the Company may have for the above loss and damages.

Business, Basis of Presentation and Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2020
Accounting Policies [Abstract]
Business	Business MagnaChip Semiconductor Corporation (together with its subsidiaries, the “Company”) is a designer and manufacturer of analog and mixed-signal semiconductor platform solutions for communications, Internet of Things (“IoT”) applications, consumer, industrial and automotive applications. The Company provides technology platforms for analog, mixed signal, power, high voltage, non-volatile memory and Radio Frequency (“RF”) applications. On March 30, 2020, the Company entered into a definitive Business Transfer Agreement (the “BTA”) for the sale of its Foundry Services Group business and its fabrication facility located in Cheongju (“Fab 4”), the larger of the Company’s two 8-inch manufacturing facilities, to Magnus Semiconductor, LLC, a Korean limited liability company, or one of its wholly owned subsidiaries (the “Buyer”) for a purchase price equal to the KRW equivalent of $344.7 million in cash, subject to working capital adjustments set forth in the BTA. The Buyer is a special purpose company formed by Alchemist Capital Partners Korea Co., Ltd. and Credian Partners, Inc. This planned divestiture of the Foundry Services Group business and Fab 4 will allow the Company to strategically shift its operational focus to its standard products business. The Foundry Services Group was historically a reportable segment. As a result of the entry into the BTA, the results of the Foundry Services Group were classified as discontinued operations in the Company’s consolidated statements of operations and excluded from both continuing operations and segment results for all periods presented. Accordingly, commencing with the first quarter of 2020, the Company has one reportable segment: its standard products business, together with transitional foundry services associated with its fabrication facility located in Gumi, Korea, known as “Fab 3,” that it expects to perform for the Buyer for a period of up to three years (the “Transitional Fab 3 Foundry Services”). The Company’s standard products business includes its Display Solutions and Power Solutions business lines. The Company’s Display Solutions products provide panel display solutions to major suppliers of large and small rigid and flexible panel displays, and mobile, automotive applications and home appliances. The Company’s Power Solutions products include discrete and integrated circuit solutions for power management in communications, consumer and industrial applications.
Basis of Presentation	Basis of Presentation The accompanying unaudited interim consolidated financial statements of the Company have been prepared in accordance with generally accepted accounting principles in the United States of America (“US GAAP”). These interim consolidated financial statements include normal recurring adjustments and the elimination of all intercompany accounts and transactions which are, in the opinion of management, necessary to provide a fair statement of the Company’s financial condition and results of operations for the periods presented. These interim consolidated financial statements are presented in accordance with Accounting Standards Codification 270, “Interim Reporting” and, accordingly, do not include all of the information and note disclosures required by US GAAP for complete financial statements, except for the changes below. The results of operations for the three and six months ended June 30, 2020 are not necessarily indicative of the results to be expected for a full year or for any other periods. The Company has reclassified certain prior year amounts to conform to the current year’s presentation for discontinued operations to reflect the anticipated divestiture of its Foundry Services Group business and Fab 4. The assets to be acquired and liabilities to be transferred to the Buyer, as specified in the BTA, have been classified as assets and liabilities held for sale in the Company’s consolidated balance sheets, subject to adjustments set forth in the BTA. See Note 2 “Discontinued Operations and Assets Held for Sale” for additional information. The consolidated statements of cash flows have not been adjusted to separately disclose cash flows related to discontinued operations, but the material items in the operating and investing activities of cash flows relating to discontinued operations are disclosed in Note 2. Unless otherwise stated, information in these notes to consolidated financial statements relates to the Company’s continuing operations and excludes the discontinued operations. There have been no material changes to the Company’s significant accounting policies as of and for the three and six months ended June 30, 2020, except for those related to discontinued operations and assets held for sale as described below, as compared to the significant accounting policies described in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2019.
Discontinued Operations and Assets Held for Sale	Discontinued Operations and Assets Held for Sale The Company reports the results of operations of a business as discontinued operations if a disposal represents a strategic shift that has or will have a major effect on the Company’s operations and financial results when the business is sold and classified as held for sale, in accordance with the criteria of Accounting Standard Codification (“ASC”) 205, “Presentation of Financial Statements” (“ASC 205”) and ASC 360, “Property, Plant and Equipment” (“ASC 360”). Assets and liabilities of a business classified as held for sale are recorded at the lower of its carrying amount or estimated fair value less costs to sell , and depreciation and amortization ceases on the date that the held for sale criteria are met. If the carrying amount of the business exceeds its estimated fair value less costs to sell, a loss is recognized. Assets and liabilities related to discontinued operations classified as held for sale are segregated in the current and prior balance sheets in the period in which the business is classified as held for sale. The results of discontinued operations are reported in “Income (loss) from discontinued operations, net of tax” in the accompanying consolidated statements of operations for the current and prior periods commencing in the period in which the business meets the criteria.
Recent Accounting Pronouncements Not Yet Adopted	Recent Accounting Pronouncements Not Yet Adopted In December 2019, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update No. 2019-12, “Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes” (“ASU 2019-12”). ASU 2019-12 removes certain exceptions to the general principles in Topic 740 and improves consistent application of and simplifies GAAP for other areas of Topic 740 by clarifying and amending existing guidance. ASU 2019-12 is effective for fiscal years beginning after December 15, 2020, and interim periods within those fiscal years. The Company does not expect the adoption of ASU 2019-12 to have a material effect on the Company’s consolidated financial statements.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements In June 2016, the FASB issued Accounting Standards Update No. 2016-13, “Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” (“ASU 2016-13”). ASU 2016-13 amends the impairment model by requiring entities to use a forward-looking approach based on expected losses to estimate credit losses on certain types of financial instruments, including trade receivables. In April 2019, the FASB issued Accounting Standards Update No. 2019-04, “Codification Improvements to Topic 326, Financial Instruments—Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments” (“ASU 2019-04”), and in November 2019, the FASB issued Accounting Standards Update No. 2019-11, “Codification Improvements to Topic 326, Financial Instruments—Credit Losses” (“ASU 2019-11”) to clarify and address certain items related to the amendments in ASU 2016-13. In February 2020, the FASB issued Accounting Standards Update No. 2020-02, “Financial Instruments—Credit Losses (Topic 326)” (“ASU 2020-02”), which incorporates SEC SAB 119 (updated from SAB 102) into the ASC by aligning SEC recommended policies and procedures with ASC 326.The Company adopted ASU 2016-13, ASU 2019-04, ASU 2019-11 and ASU 2020-02 as of January 1, 2020, and the adoption did not have a material impact on the Company’s consolidated financial statements. In August 2018, the FASB issued Accounting Standards Update No. 2018-13 “Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement” (“ASU 2018-13”). ASU 2018-13 amends existing fair value measurement disclosure requirements by adding, changing, or removing certain disclosures. The Company adopted ASU 2018-13 as of January 1, 2020, and the adoption of ASU 2018-13 did not impact the Company’s consolidated financial statements.

Discontinued Operations and Assets Held for Sale (Tables)

6 Months Ended

Jun. 30, 2020

Discontinued Operations and Assets Held for Sale [Abstract]

Schedule Of Results From Discontinued Operations

The following table summarizes the results from discontinued operations, net of tax, for the three and six months ended June 30, 2020 and 2019.


	Three Months Ended						Six Months Ended
	June 30, 2020			June 30, 2019			June 30, 2020			June 30, 2019
	(In thousands of US dollars, except share data)
Revenues:
Net sales – Foundry Services Group	$	95,779		$	73,139		$	182,058		$	130,255
Net sales – transitional Fab 3 foundry services		(9,873	)		(8,879	)		(19,610	)		(15,882	)

Total revenues		85,906			64,260			162,448			114,373
Cost of sales:
Cost of sales – Foundry Services Group		64,869			60,921			130,452			114,359
Cost of sales – transitional Fab 3 foundry services		(9,873	)		(8,879	)		(19,610	)		(15,882	)

Total cost of sales		54,996			52,042			110,842			98,477

Gross profit		30,910			12,218			51,606			15,896
Operating expenses:
Selling, general and administrative expenses		4,992			5,880			10,636			11,914
Research and development expenses		6,915			7,217			14,318			15,191
Restructuring and other charges		589			1,130			2,704			4,024

Total operating expenses		12,496			14,227			27,658			31,129

Operating income (loss) from discontinued operations		18,414			(2,009	)		23,948			(15,233	)

Foreign currency gain (loss), net		(23	)		1,140			2,074			1,753
Others, net		(59	)		(135	)		48			(49	)

Income (loss) from discontinued operations before income tax expense		18,332			(1,004	)		26,070			(13,529	)
Income tax expense		935			26			1,344			71

Income (loss) from discontinued operations, net of tax		17,397			(1,030	)		24,726			(13,600	)

Schedule Of Results From Discontinued Operations Balance Sheet


	June 30, 2020		December 31, 2019
	(In thousands of US dollars)
Assets
Current assets
Accounts receivable, net	$	42,789	$	48,194
Unbilled accounts receivable		5,936		16,463
Inventories, net		36,602		31,863
Other current assets		2,933		3,301
Other assets of the disposal group classified as held for sale		683		—

Total current assets held for sale	$	88,943	$	99,821

Property, plant and equipment, net		103,887		109,506
Intangible assets, net		1,350		1,245
Other non-current assets		10,906		12,683

Total assets held for sale	$	205,086	$	223,255

Liabilities
Current liabilities
Accounts payable	$	21,530	$	20,503
Other current liabilities		14,266		16,537

Total current liabilities held for sale	$	35,796	$	37,040

Accrued severance benefits, net		97,485		95,547
Other non-current liabilities		13,288		15,334

Total liabilities held for sale	$	146,569	$	147,921

Schedule Of Results From Discontinued Operations Alternative Cash Flow Information

The following table provides supplemental cash flows information related to discontinued operations:


	Six Months Ended
	June 30, 2020			June 30, 2019
	(In thousands of US dollars)
Significant non-cash operating activities:
Depreciation and amortization	$	5,365		$	11,403
Provision for severance benefits		6,405			3,763
Stock-based compensation		263			210
Investing activities:
Capital expenditures	$	(4,415	)	$	(8,262	)

Inventories (Tables)

6 Months Ended

Jun. 30, 2020

Inventory Disclosure [Abstract]

Summary of Inventories

Inventories as of June 30, 2020 and December 31, 2019 consist of the following (in thousands):


	June 30, 2020			December 31, 2019
Finished goods	$	11,252		$	10,087
Semi-finished goods and work-in-process		32,196			28,815
Raw materials		6,627			8,449
Materials in-transit		743			—
Less: inventory reserve		(5,307	)		(5,947	)

Inventories, net	$	45,511		$	41,404

Changes in Inventory Reserve

Changes in inventory reserve for the three and six months ended June 30, 2020 and 2019 are as follows (in thousands):


	Three Months Ended			Six Months Ended			Three Months Ended			Six Months Ended
	June 30, 2020						June 30, 2019
Beginning balance	$	(4,807	)	$	(5,947	)	$	(8,690	)	$	(4,845	)
Change in reserve
Inventory reserve charged to costs of sales		(1,794	)		(3,069	)		(4,374	)		(9,447	)
Sale of previously reserved inventory		747			1,653			490			966

		(1,047	)		(1,416	)		(3,884	)		(8,481	)
Write off		642			1,141			624			1,216
Translation adjustments		(95	)		221			168			328
Reclassified to assets held for sale		—			694			—			—

Ending balance	$	(5,307	)	$	(5,307	)	$	(11,782	)	$	(11,782	)

Property, Plant and Equipment (Tables)

6 Months Ended

Jun. 30, 2020

Property, Plant and Equipment [Abstract]

Summary of Property, Plant and Equipment

Property, plant and equipment as of June 30, 2020 and December 31, 2019 are comprised of the following (in thousands):


	June 30, 2020			December 31, 2019
Buildings and related structures	$	21,938		$	22,502
Machinery and equipment		87,505			89,453
Finance lease right-of-use assets		312			323
Others		23,360			22,242

		133,115			134,520
Less: accumulated depreciation		(77,747	)		(75,704	)
Land		13,742			14,252

Property, plant and equipment, net	$	69,110		$	73,068

Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Intangible Assets

Intangible assets as of June 30, 2020 and December 31, 2019 are comprised of the following (in thousands):


	June 30, 2020
	Gross amount		Accumulated amortization			Net amount
Technology	$	6,340	$	(6,340	)	$	—
Customer relationships		9,816		(9,816	)		—
Intellectual property assets		8,555		(5,965	)		2,590

Intangible assets, net	$	24,711	$	(22,121	)	$	2,590


	December 31, 2019
	Gross amount		Accumulated amortization			Net amount
Technology	$	6,575	$	(6,575	)	$	—
Customer relationships		10,180		(10,180	)		—
Intellectual property assets		8,637		(5,868	)		2,769

Intangible assets, net	$	25,392	$	(22,623	)	$	2,769

Leases (Tables)

6 Months Ended

Jun. 30, 2020

Leases [Abstract]

Supplemental Balance Sheet Information Related To Leases [Table Text Block]

Supplemental balance sheets information related to leases as of June 30, 2020 and December 31, 2019 are as follows (in thousands):


Leases	Classification	June 30, 2020		December 31, 2019
Assets
Operating lease	Operating lease right-of-use assets	$	1,182	$	1,876
Finance lease	Property, plant and equipment, net		218		258

Total lease assets		$	1,400	$	2,134

Liabilities
Current
Operating	Operating lease liabilities	$	1,053	$	1,625
Finance	Other current liabilities		60		60
Non-current
Operating	Other non-current liabilities		129		251
Finance	Other non-current liabilities		170		208

Total lease liabilities		$	1,412	$	2,144

Lease, Cost [Table Text Block]

The components of lease cost included in the Company’s consolidated statements of operations, are as follows (in thousands):


	Three Months Ended				Six Months Ended
	June 30, 2020		June 30, 2019		June 30, 2020		June 30, 2019
Operating lease cost	$	461	$	501	$	929	$	1,026
Finance lease cost
Amortization of right-of-use assets		15		16		31		33
Interest on lease liabilities		4		6		9		12

Total lease cost	$	480	$	523	$	969	$	1,071

Other Lease Information [Table Text Block]

The following table presents the weighted average remaining lease term and discount rate:


	June 30, 2020			December 31, 2019
Weighted average remaining lease term
Operating leases		1.0 years			1.1 years
Finance leases		3.5 years			4.0 years
Weighted average discount rate
Operating leases		7.01	%		7.19	%
Finance leases		7.75	%		7.75	%

Other lease information is as follows (in thousands):


	Three Months Ended				Six Months Ended
	June 30, 2020		June 30, 2019		June 30, 2020		June 30, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$	461	$	501	$	929	$	1,026
Operating cash flows from finance leases		4		6		9		12
Financing cash flows from finance leases		14		14		28		28

Schedule Of Future Lease Payments [Table Text Block]

The aggregate future lease payments for operating and finance leases as of June 30, 2020 are as follows (in thousands):


	Operating Leases			Finance Leases
2020	$	820		$	37
2021		335			75
2022		58			75
2023		14			75
Thereafter		—			—

Total future lease payments		1,227			262
Less: Imputed interest		(45	)		(32	)

Present value of future payments	$	1,182		$	230

Accrued Expenses (Tables)

6 Months Ended

Jun. 30, 2020

Payables and Accruals [Abstract]

Summary of Accrued Expenses

Accrued expenses as of June 30, 2020 and December 31, 2019 are comprised of the following (in thousands):


	June 30, 2020		December 31, 2019
Payroll, benefits and related taxes, excluding severance benefits	$	10,165	$	8,493
Withholding tax attributable to intercompany interest income		24,457		23,371
Interest on senior notes		8,205		8,205
Outside service fees		922		1,996
Others		1,986		2,734

Accrued expenses	$	45,735	$	44,799

Derivative Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2020

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Details of Derivative Contracts

Details of derivative contracts as of June 30, 2020 are as follows (in thousands):

Date of transaction

Type of derivative

Total notional amount

Month of settlement

December 4, 2019

Zero cost collar

30,000

July 2020 to December 2020

January 31, 2020

Zero cost collar

30,000

July 2020 to December 2020

February 3, 2020

Zero cost collar

18,000

July 2020 to December 2020

February 21, 2020

Zero cost collar

30,000

July 2020 to December 2020

Details of derivative contracts as of December 31, 2019 are as follows (in thousands):

Date of transaction

Type of derivative

Total notional amount

Month of settlement

August 13, 2019

Zero cost collar

60,000

January 2020 to June 2020

September 27, 2019

Zero cost collar

42,000

January 2020 to June 2020

December 4, 2019

Zero cost collar

30,000

July 2020 to December 2020

Fair Values of Outstanding Zero Cost Collar and Forward Contracts Recorded as Assets and Liabilities

The fair values of the Company’s outstanding zero cost collar contracts recorded as assets and liabilities as of June 30, 2020 and December 31, 2019 are as follows (in thousands):


Derivatives designated as hedging instruments:		June 30, 2020		December 31, 2019
Asset Derivatives:
Zero cost collars	Other current assets	$	—	$	1,456
Liability Derivatives:
Zero cost collars	Other current liabilities	$	1,188	$	—

Offsetting of Derivative Liabilities

Offsetting of derivative liabilities as of June 30, 2020 is as follows (in thousands):


As of June 30, 2020	Gross amounts of recognized liabilities		Gross amounts offset in the balance sheets		Net amounts of liabilities presented in the balance sheets		Gross amounts not offset in the balance sheets					Net amount
As of June 30, 2020	Gross amounts of recognized liabilities		Gross amounts offset in the balance sheets		Net amounts of liabilities presented in the balance sheets		Financial instruments		Cash collateral pledged			Net amount
Liability Derivatives:
Zero cost collars	$	1,188	$	—	$	1,188	$	—	$	(1,190	)	$	(2	)

Offsetting of Derivative Assets

Offsetting of derivative assets as of December 31, 2019 is as follows (in thousands):


As of December 31, 2019	Gross amounts of recognized assets		Gross amounts offset in the balance sheets		Net amounts of assets presented in the balance sheets		Gross amounts not offset in the balance sheets				Net amount
As of December 31, 2019	Gross amounts of recognized assets		Gross amounts offset in the balance sheets		Net amounts of assets presented in the balance sheets		Financial instruments		Cash collateral pledged		Net amount
Asset Derivatives:
Zero cost collars	$	1,456	$	—	$	1,456	$	—	$	1,070	$	2,526

Impact of Derivative Instruments on Consolidated Statement of Operations

The following table summarizes the impact of derivative instruments on the consolidated statements of operations for the three months ended June 30, 2020 and 2019 (in thousands):


Derivatives in ASC 815 Cash Flow Hedging Relationships	Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)					Location/Amount of Loss Reclassified from AOCI Into Statement of Operations (Effective Portion)								Location/Amount of Gain (Loss) Recognized in Statement of Operations on Derivatives (Ineffective Portion)
	Three Months Ended June 30,							Three Months Ended June 30,								Three Months Ended June 30,
	2020		2019					2020			2019					2020		2019
Zero cost collars	$	2,204	$	(1,136	)		Net sales	$	(193	)	$	(203	)		Other income, net	$	55	$	(11	)
Forwards	$	—	$	(1,363	)		Net sales	$	—		$	(1,661	)		Other income, net	$	—	$	(69	)

	$	2,204	$	(2,499	)			$	(193	)	$	(1,864	)			$	55	$	(80	)

The following table summarizes the impact of derivative instruments on the consolidated statements of operations for the six months ended June 30, 2020 and 2019 (in thousands):


Derivatives in ASC 815 Cash Flow Hedging Relationships	Amount of Loss Recognized in AOCI on Derivatives (Effective Portion)						Location/Amount of Loss Reclassified from AOCI Into Statement of Operations (Effective Portion)								Location/Amount of Gain (Loss) Recognized in Statement of Operations on Derivatives (Ineffective Portion)
	Six Months Ended June 30,								Six Months Ended June 30,								Six Months Ended June 30,
	2020			2019					2020			2019					2020		2019
Zero cost collars	$	(2,800	)	$	(1,102	)		Net sales	$	(251	)	$	(203	)		Other income, net	$	172	$	(11	)
Forwards	$	—		$	(1,798	)		Net sales	$	—		$	(1,750	)		Other income, net	$	—	$	(125	)

	$	(2,800	)	$	(2,900	)			$	(251	)	$	(1,953	)			$	172	$	(136	)

- Definition

Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.

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+ Details

Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2020

Fair Value Disclosures [Abstract]

Financial Assets and Liabilities Measured at Fair Value on Recurring Basis

As of June 30, 2020, the following table represents the Company’s liabilities measured at fair value on a recurring basis and the basis for that measurement (in thousands):


	Carrying Value June 30, 2020		Fair Value Measurement June 30, 2020		Quoted Prices in Active Markets for Identical liability (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Liabilities:
Derivative liabilities (other current liabilities)	$	1,188	$	1,188		—	$	1,188		—

As of December 31, 2019, the following table represents the Company’s assets measured at fair value on a recurring basis and the basis for that measurement (in thousands):


	Carrying Value December 31, 2019		Fair Value Measurement December 31, 2019		Quoted Prices in Active Markets for Identical Asset (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Derivative assets (other current assets)	$	1,456	$	1,456		—	$	1,456		—

Schedule of Fair Value of Long-term Borrowings

Fair Value of Borrowings


	June 30, 2020				December 31, 2019
	Carrying Value		Fair Value		Carrying Value		Fair Value
	(In thousands of US dollars)
Borrowings:
5.0% Exchangeable Senior Notes due March 2021 (Level 2)	$	82,706	$	103,838	$	81,959	$	116,078
6.625% Senior Notes due July 2021 (Level 2)	$	223,242	$	218,644	$	222,784	$	224,250

- Definition

Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances.

+ References + Details

Borrowings (Tables)

6 Months Ended

Jun. 30, 2020

Debt Disclosure [Abstract]

Components of Long-term Borrowings

Borrowings as of June 30, 2020 and December 31, 2019 are as follows (in thousands):


	June 30, 2020			December 31, 2019
5.0% Exchangeable Senior Notes due March 2021	$	83,740		$	83,740
6.625% Senior Notes due July 2021		224,250			224,250
Less: unamortized discount and debt issuance costs		(2,042	)		(3,247	)

Total borrowings, net		305,948			304,743
Less: current portion of long-term borrowings, net		(82,706	)		—

Long-term borrowings, net	$	223,242		$	304,743

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

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+ Details

Accrued Severance Benefits (Tables)

6 Months Ended

Jun. 30, 2020

Postemployment Benefits [Abstract]

Changes in Accrued Severance Benefits

Changes in accrued severance benefits are as follows (in thousands):


	Three Months Ended			Six Months Ended			Three Months Ended			Six Months Ended
	June 30, 2020						June 30, 2019
Beginning balance	$	50,610		$	53,344		$	54,553		$	55,691
Provisions		1,755			3,774			1,329			2,643
Severance payments		(1,502	)		(3,454	)		(1,799	)		(3,295	)
Translation adjustments		922			(1,879	)		(881	)		(1,837	)

		51,785			51,785			53,202			53,202
Less: Cumulative contributions to severance insurance deposit accounts		(1,570	)		(1,570	)		(1,099	)		(1,099	)
The National Pension Fund		(73	)		(73	)		(84	)		(84	)
Group severance insurance plan		(215	)		(215	)		(236	)		(236	)

Accrued severance benefits, net	$	49,927		$	49,927		$	51,783		$	51,783

Future Benefits Payments to Employees

The Company is liable to pay the following future benefits to its

non-executive

employees upon their normal retirement age (in thousands):


	Severance benefit
Remainder of 2020	$	379
2021		401
2022		741
2023		596
2024		1,178
2025		2,104
2026 – 2030		19,482

Geographic and Other Information (Tables)

6 Months Ended

Jun. 30, 2020

Segment Reporting [Abstract]

Schedule of Operating Segments

The following sets forth information relating to the single continuing operating segment (in thousands):


	Three Months Ended				Six Months Ended
	June 30, 2020		June 30, 2019		June 30, 2020		June 30, 2019
Revenues
Standard products business
Display Solutions	$	69,176	$	84,261	$	146,769	$	142,491
Power Solutions		39,779		47,745		72,922		89,779

Total standard products business		108,955		132,006		219,691		232,270
Transitional Fab 3 foundry services		9,873		8,879		19,610		15,882

Total revenues	$	118,828	$	140,885	$	239,301	$	248,152


	Three Months Ended				Six Months Ended
	June 30, 2020		June 30, 2019		June 30, 2020		June 30, 2019
Gross Profit
Standard products business	$	32,138	$	31,622	$	61,268	$	50,645
Transitional Fab 3 foundry services		—		—		—		—

Total gross profit	$	32,138	$	31,622	$	61,268	$	50,645

Net Sales by Region, Based on Location of Products are Billed


	Three Months Ended				Six Months Ended
	June 30, 2020		June 30, 2019		June 30, 2020		June 30, 2019
Korea	$	21,957	$	36,559	$	52,774	$	71,205
Asia Pacific (other than Korea)		84,210		93,657		161,752		157,404
U.S.A.		1,461		656		2,170		1,118
Europe		856		881		1,827		2,014
Others		471		253		1,168		529

Total	$	108,955	$	132,006	$	219,691	$	232,270

Accumulated Other Comprehensive Income (Loss) (Tables)

6 Months Ended

Jun. 30, 2020

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Loss

Accumulated other comprehensive income (loss) consists of the following as of June 30, 2020 and December 31, 2019, respectively (in thousands):


	June 30, 2020			December 31, 2019
Foreign currency translation adjustments	$	11,503		$	(4,205	)
Derivative adjustments		(1,004	)		1,545

Total	$	10,499		$	(2,660	)

Changes in Accumulated Other Comprehensive Loss

Changes in accumulated other comprehensive income (loss) for the three months ended June 30, 2020 and 2019 are as follows (in thousands):


Three Months Ended June 30, 2020	Foreign currency translation adjustments			Derivative adjustments			Total
Beginning balance	$	18,046		$	(3,401	)	$	14,645

Other comprehensive income (loss) before reclassifications		(6,543	)		2,204			(4,339	)
Amounts reclassified from accumulated other comprehensive loss		—			193			193

Net current-period other comprehensive income (loss)		(6,543	)		2,397			(4,146	)

Ending balance	$	11,503		$	(1,004	)	$	10,499


Three Months Ended June 30, 2019	Foreign currency translation adjustments			Derivative adjustments			Total
Beginning balance	$	(12,757	)	$	(361	)	$	(13,118	)

Other comprehensive income (loss) before reclassifications		7,680			(2,499	)		5,181
Amounts reclassified from accumulated other comprehensive loss		—			1,864			1,864

Net current-period other comprehensive income (loss)		7,680			(635	)		7,045


Three Months Ended June 30, 2020	Foreign currency translation adjustments			Derivative adjustments			Total
Ending balance	$	(5,077	)	$	(996	)	$	(6,073	)

Changes in accumulated other comprehensive income (loss) for the six months ended June 30, 2020 and 2019 are as follows (in thousands):


Six Months Ended June 30, 2020	Foreign currency translation adjustments			Derivative adjustments			Total
Beginning balance	$	(4,205	)	$	1,545		$	(2,660	)

Other comprehensive income (loss) before reclassifications		15,708			(2,800	)		12,908
Amounts reclassified from accumulated other comprehensive loss		—			251			251

Net current-period other comprehensive income (loss)		15,708			(2,549	)		13,159

Ending balance	$	11,503		$	(1,004	)	$	10,499


Six Months Ended June 30, 2019	Foreign currency translation adjustments			Derivative adjustments			Total
Beginning balance	$	(20,061	)	$	(49	)	$	(20,110	)

Other comprehensive income (loss) before reclassifications		14,984			(2,900	)		12,084
Amounts reclassified from accumulated other comprehensive loss		—			1,953			1,953

Net current-period other comprehensive income (loss)		14,984			(947	)		14,037

Ending balance	$	(5,077	)	$	(996	)	$	(6,073	)

Earnings (Loss) Per Share (Tables)

6 Months Ended

Jun. 30, 2020

Earnings Per Share [Abstract]

Schedule of Computation of Basic and Diluted Loss Per Common Share

The following table illustrates the computation of basic and diluted earnings (loss) per common share for the three and six months ended June 30, 2020 and 2019:


	Three Months Ended					Six Months Ended
	June 30, 2020		June 30, 2019			June 30, 2020			June 30, 2019
	(In thousands of US dollars, except share data)
Basic earnings (loss) per share
Income (loss) from continuing operations	$	11,774	$	(8,490	)	$	(19,304	)	$	(30,045	)
Income (loss) from discontinued operations, net of tax		17,397		(1,030	)		24,726			(13,600	)

Net income (loss)	$	29,171	$	(9,520	)	$	5,422		$	(43,645	)

Basic weighted average common stock outstanding		35,092,312		34,245,127			34,992,734			34,220,141
Basic earnings (loss) per common share
Continuing operations	$	0.34	$	(0.25	)	$	(0.55	)	$	(0.88	)
Discontinued operations		0.50		(0.03	)		0.71			(0.40	)

Total	$	0.84	$	(0.28	)	$	0.16		$	(1.28	)

Diluted earnings (loss) per share
Income (loss) from continuing operations	$	11,774	$	(8,490	)	$	(19,304	)	$	(30,045	)
Add back: Interest expense on Exchangeable Notes		1,425		—			—			—

Income (loss) from continuing operations allocated to common stockholders	$	13,199	$	(8,490	)	$	(19,304	)	$	(30,045	)
Income (loss) from discontinued operations, net of tax		17,397		(1,030	)		24,726			(13,600	)
Net income (loss) allocated to common stockholders	$	30,596	$	(9,520	)	$	5,422		$	(43,645	)

Basic weighted average common stock outstanding		35,092,312		34,245,127			34,992,734			34,220,141
Net effect of dilutive equity awards		1,237,770		—			—			—
Net effect of assumed conversion of 5.0% Exchangeable Notes to common stock		10,144,155		—			—			—

Diluted weighted average common stock outstanding		46,474,237		34,245,127			34,992,734			34,220,141
Continuing operations	$	0.28	$	(0.25	)	$	(0.55	)	$	(0.88	)
Discontinued operations		0.37		(0.03	)		0.71			(0.40	)

Total	$	0.65	$	(0.28	)	$	0.16		$	(1.28	)

Schedule of Antidilutive Securities Excluded from the Computation of Loss Per Common Share

The following outstanding instruments were excluded from the computation of diluted loss per share, as they have an anti-dilutive effect on the calculation:


	Three Months Ended				Six Months Ended
	June 30, 2020		June 30, 2019		June 30, 2020		June 30, 2019
Options		699,167		2,611,832		2,075,494		2,611,832
Restricted Stock Units		—		501,490		1,238,639		501,490

Business, Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) $ in Millions	Mar. 30, 2020 USD ($)	Jun. 30, 2020 Facilities
Foundry Services Group And Fab Four [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of facilities \| Facilities		2
Foundry Services Group [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Proceeds from Sale of Business \| $	$ 344.7

Discontinued Operations and Assets Held for Sale - Schedule Of Results From Discontinued Operations (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Operating Expenses [Abstract]
Selling, general and administrative expenses	$ 12,408	$ 11,095	$ 24,510	$ 23,131
Research and development expenses	11,108	11,772	21,617	23,816
Total operating expenses	23,516	22,867	46,681	46,947
Foreign currency gain (loss), net	8,469	(11,571)	(22,502)	(22,181)
Income (loss) from discontinued operations, net of tax	17,397	(1,030)	24,726	(13,600)
Discontinued Operations [Member]
Revenues:
Total revenues	85,906	64,260	162,448	114,373
Cost of sales:
Total cost of sales	54,996	52,042	110,842	98,477
Gross profit	30,910	12,218	51,606	15,896
Operating Expenses [Abstract]
Selling, general and administrative expenses	4,992	5,880	10,636	11,914
Research and development expenses	6,915	7,217	14,318	15,191
Restructuring and other charges	589	1,130	2,704	4,024
Total operating expenses	12,496	14,227	27,658	31,129
Operating income (loss) from discontinued operations	18,414	(2,009)	23,948	(15,233)
Foreign currency gain (loss), net	(23)	1,140	2,074	1,753
Others, net	(59)	(135)	48	(49)
Income (loss) from discontinued operations before income tax expense	18,332	(1,004)	26,070	(13,529)
Income tax expense	935	26	1,344	71
Income (loss) from discontinued operations, net of tax	17,397	(1,030)	24,726	(13,600)
Foundry Services Group [Member] \| Discontinued Operations [Member]
Revenues:
Total revenues	95,779	73,139	182,058	130,255
Cost of sales:
Total cost of sales	64,869	60,921	130,452	114,359
Fab Three Foundry Services [Member] \| Discontinued Operations [Member]
Revenues:
Total revenues	(9,873)	(8,879)	(19,610)	(15,882)
Cost of sales:
Total cost of sales	$ (9,873)	$ (8,879)	$ (19,610)	$ (15,882)

Discontinued Operations and Assets Held for Sale - Additional Information (Detail) - Foundry Services Group And Fab Four [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Schedule Of Disposal Group Not Discontinued Operation Income Statement [Line Items]
Income (loss) from discontinued operations before income tax expense	$ 589	$ 1,130	$ 2,704	$ 1,873
Income tax expense				$ 2,151

- Definition

Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

+ References + Details

- Definition

Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

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-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32672-109319

+ Details

Discontinued Operations and Assets Held for Sale - Schedule Of Results From Discontinued Operations Balance Sheet (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets
Total current assets held for sale	$ 205,086	$ 99,821
Current liabilities
Total current liabilities held for sale	146,569	37,040
Foundry Services Group And Fab Three Foundry Services [Member]
Current assets
Accounts receivable, net	42,789	48,194
Unbilled accounts receivable	5,936	16,463
Inventories, net	36,602	31,863
Other current assets	2,933	3,301
Other assets of the disposal group classified as held for sale	683
Total current assets held for sale	88,943	99,821
Property, plant and equipment, net	103,887	109,506
Intangible assets, net	1,350	1,245
Other non-current assets	10,906	12,683
Total assets held for sale	205,086	223,255
Current liabilities
Accounts payable	21,530	20,503
Other current liabilities	14,266	16,537
Total current liabilities held for sale	35,796	37,040
Accrued severance benefits, net	97,485	95,547
Other non-current liabilities	13,288	15,334
Total liabilities held for sale	$ 146,569	$ 147,921

Discontinued Operations and Assets Held for Sale - Schedule Of Results From Discontinued Operations Alternative Cash Flow Information (Detail) - Foundry Services Group And Fab Three Foundry Services [Member] - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Significant non-cash operating activities:
Depreciation and amortization	$ 5,365	$ 11,403
Provision for severance benefits	6,405	3,763
Stock-based compensation	263	210
Investing activities:
Capital expenditures	$ (4,415)	$ (8,262)

Sales of Accounts Receivable and Receivable Discount Program - Additional Information (Detail) - Trade Accounts Receivable [Member] - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sale of accounts receivable	$ 0	$ 13,637
Selling, General and Administrative Expenses [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Pre-tax losses on accounts receivable		$ 42

Inventories - Summary of Inventories (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Finished goods	$ 11,252		$ 10,087
Semi-finished goods and work-in-process	32,196		28,815
Raw materials	6,627		8,449
Materials in-transit	743
Less: inventory reserve	(5,307)	$ (4,807)	(5,947)	$ (11,782)	$ (8,690)	$ (4,845)
Inventories, net	$ 45,511		$ 41,404

Inventories - Changes in Inventory Reserve (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Inventory Disclosure [Abstract]
Beginning balance	$ (4,807)	$ (8,690)	$ (5,947)	$ (4,845)
Change in reserve
Inventory reserve charged to costs of sales	(1,794)	(4,374)	(3,069)	(9,447)
Sale of previously reserved inventory	747	490	1,653	966
Change in reserve	(1,047)	(3,884)	(1,416)	(8,481)
Write off	642	624	1,141	1,216
Translation adjustments	(95)	168	221	328
Reclassified to assets held for sale	0		694
Ending balance	$ (5,307)	$ (11,782)	$ (5,307)	$ (11,782)

Property, Plant and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Property, Plant and Equipment [Line Items]
Depreciation expenses	$ 4,794	$ 4,815
Payment of Termination Fee	34,470
Escrow Deposit	$ 34,470

Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 133,115	$ 134,520
Less: accumulated depreciation	(77,747)	(75,704)
Property, plant and equipment, net	69,110	73,068
Buildings and Related Structures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	21,938	22,502
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	87,505	89,453
Finance Lease Right Of Use Assets [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	312	323
Others [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	23,360	22,242
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 13,742	$ 14,252

Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense for intangible assets	$ 320	$ 287

Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Intangible asset, Gross amount	$ 24,711	$ 25,392
Accumulated amortization	(22,121)	(22,623)
Intangible asset, Net amount	2,590	2,769
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset, Gross amount	6,340	6,575
Accumulated amortization	(6,340)	(6,575)
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset, Gross amount	9,816	10,180
Accumulated amortization	(9,816)	(10,180)
Intellectual Property Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset, Gross amount	8,555	8,637
Accumulated amortization	(5,965)	(5,868)
Intangible asset, Net amount	$ 2,590	$ 2,769

Leases - Additional Information (Detail)	6 Months Ended
Leases - Additional Information (Detail)	Jun. 30, 2020
Maximum [Member]
Lease Agreements Remaining Term of Lease	4 years
Minimum [Member]
Lease Agreements Remaining Term of Lease	1 year

Leases - Supplemental Balance Sheet (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Assets
Operating lease	$ 1,182	$ 1,876
Total lease assets	1,400	2,134
Current
Operating	1,053	1,625
Non-current
Total lease liabilities	1,412	2,144
Operating Lease Right Of Use Assets [Member]
Assets
Operating lease	1,182	1,876
Property, Plant and Equipment, Net [Member]
Assets
Finance lease	218	258
Current Operating Lease Liabilities [Member]
Current
Operating	1,053	1,625
Other Current Liabilities [Member]
Current
Finance	60	60
Non Current Operating Lease Liabilities [Member]
Non-current
Operating	129	251
Other Noncurrent Liabilities [Member]
Non-current
Finance	$ 170	$ 208

Leases - Components of lease cost (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Operating lease cost	$ 461	$ 501	$ 929	$ 1,026
Finance lease cost [Abstract]
Amortization of right-of-use assets	15	16	31	33
Interest on lease liabilities	4	6	9	12
Total lease cost	$ 480	$ 523	$ 969	$ 1,071

Leases - Other lease information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 461	$ 501	$ 929	$ 1,026
Operating cash flows from finance leases	4	6	9	12
Financing cash flows from finance leases	$ 14	$ 14	$ 28	$ 28
Weighted average remaining lease term
Operating leases	1 year		1 year		1 year 1 month 6 days
Finance leases	3 years 6 months		3 years 6 months		4 years
Weighted average discount rate
Operating leases	7.01%		7.01%		7.19%
Finance leases	7.75%		7.75%		7.75%

Leases - Aggregate future lease payment (Detail) $ in Thousands	Jun. 30, 2020 USD ($)
Leases [Abstract]
Operating Leases, 2020	$ 820
Operating Leases, 2021	335
Operating Leases, 2022	58
Operating Leases, 2023	14
Operating Leases, Thereafter
Operating Leases, Total future lease payments	1,227
Less: Present value adjustment	(45)
Present value of future payments	1,182
Finance Leases [Abstract]
Finance Leases, 2020	37
Finance Leases, 2021	75
Finance Leases, 2022	75
Finance Leases, 2023	75
Finance Leases, Thereafter
Finance Leases, Total future lease payments	262
Less: Present value adjustment	(32)
Present value of future payments	$ 230

Accrued Expenses - Summary of Accrued Expenses (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Payables and Accruals [Abstract]
Payroll, benefits and related taxes, excluding severance benefits	$ 10,165	$ 8,493
Withholding tax attributable to intercompany interest income	24,457	23,371
Interest on senior notes	8,205	8,205
Outside service fees	922	1,996
Others	1,986	2,734
Accrued expenses	$ 45,735	$ 44,799

Derivative Financial Instruments - Additional Information (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Derivative [Line Items]
Estimated amount reclassified from accumulated other comprehensive income into income, period	12 months
Estimated amount reclassified from accumulated other comprehensive income into income	$ 1,004
Zero Cost Collar and Forward Contracts [Member] \| Nomura Financial Investment (Korea) Co., Ltd. [Member]
Derivative [Line Items]
Deposit with counterparty	10,550	$ 8,750
Threshold amount of cash collateral	500
Cash collateral for credit exposure in derivatives	1,190	$ 1,070
Termination provisions for cash and cash equivalents	$ 30,000
Debt Instrument, Credit Rating	B-/B3

Derivative Financial Instruments - Details of Derivative Contracts (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Zero Cost Collar One [Member]
Derivative [Line Items]
Date of transaction	Dec. 04, 2019	Aug. 13, 2019
Type of derivative	Zero cost collar	Zero cost collar
Total notional amount	$ 30,000	$ 60,000
Month of settlement, start	2020-07	2020-01
Month of settlement, end	2020-12	2020-06
Zero Cost Collar Two [Member]
Derivative [Line Items]
Date of transaction	Jan. 31, 2020	Sep. 27, 2019
Type of derivative	Zero cost collar	Zero cost collar
Total notional amount	$ 30,000	$ 42,000
Month of settlement, start	2020-07	2020-01
Month of settlement, end	2020-12	2020-06
Zero Cost Collar Three [Member]
Derivative [Line Items]
Date of transaction	Feb. 03, 2020	Dec. 04, 2019
Type of derivative	Zero cost collar	Zero cost collar
Total notional amount	$ 18,000	$ 30,000
Month of settlement, start	2020-07	2020-07
Month of settlement, end	2020-12	2020-12
Zero Cost Collar Four [Member]
Derivative [Line Items]
Date of transaction	Feb. 21, 2020
Type of derivative	Zero cost collar
Total notional amount	$ 30,000
Month of settlement, start	2020-07
Month of settlement, end	2020-12

Derivative Financial Instruments - Fair Values of Outstanding Zero Cost Collar and Forward Contracts Recorded as Assets and Liabilities (Detail) - Zero Cost Collars [Member] - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Asset Derivatives:
Other current assets		$ 1,456
Liability Derivatives:
Other current liabilities	$ 1,188
Other Current Assets [Member]
Asset Derivatives:
Other current assets		$ 1,456
Other Current Liabilities [Member]
Liability Derivatives:
Other current liabilities	$ 1,188

Derivative Financial Instruments - Offsetting of Derivative Assets (Detail) - Zero Cost Collars [Member] $ in Thousands	Dec. 31, 2019 USD ($)
Derivative [Line Items]
Asset Derivatives, Gross amounts of recognized assets	$ 1,456
Asset Derivatives, Net amounts of assets presented in the balance sheets	1,456
Asset Derivatives, Gross amounts not offset in the balance sheets, Cash collateral pledged	1,070
Asset Derivatives, Net amount	$ 2,526

Derivative Financial Instruments - Offsetting of Derivative Liabilities (Detail) - Zero Cost Collars [Member] $ in Thousands	Jun. 30, 2020 USD ($)
Derivative [Line Items]
Liability Derivatives, Gross amounts of recognized liabilities	$ 1,188
Liability Derivatives, Net amounts of liabilities presented in the balance sheets	1,188
Liability Derivatives, Gross amounts not offset in the balance sheets, Cash collateral pledged	(1,190)
Liability Derivatives, Net amount after master netting	$ (2)

Derivative Financial Instruments - Impact of Derivative Instruments on Consolidated Statement of Operations (Detail) - Cash Flow Hedging [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Derivative [Line Items]
Amount of Loss Recognized in AOCI on Derivatives (Effective Portion)	$ 2,204	$ (2,499)	$ (2,800)	$ (2,900)
Other income, net [Member]
Derivative [Line Items]
Amount of Loss Recognized in Statement of Operations on Derivatives (Ineffective Portion)	55	(80)	172	(136)
Net Sales [Member]
Derivative [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Statement of Operations (Effective Portion)	(193)	(1,864)	(251)	(1,953)
Zero Cost Collars [Member]
Derivative [Line Items]
Amount of Loss Recognized in AOCI on Derivatives (Effective Portion)	2,204	(1,136)	(2,800)	(1,102)
Zero Cost Collars [Member] \| Other income, net [Member]
Derivative [Line Items]
Amount of Loss Recognized in Statement of Operations on Derivatives (Ineffective Portion)	55	(11)	172	(11)
Zero Cost Collars [Member] \| Net Sales [Member]
Derivative [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Statement of Operations (Effective Portion)	$ (193)	(203)	$ (251)	(203)
Forward [Member]
Derivative [Line Items]
Amount of Loss Recognized in AOCI on Derivatives (Effective Portion)		(1,363)		(1,798)
Forward [Member] \| Other income, net [Member]
Derivative [Line Items]
Amount of Loss Recognized in Statement of Operations on Derivatives (Ineffective Portion)		(69)		(125)
Forward [Member] \| Net Sales [Member]
Derivative [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Statement of Operations (Effective Portion)		$ (1,661)		$ (1,750)

Fair Value Measurements - Additional Information (Detail) - USD ($)			6 Months Ended
	Jan. 17, 2017	Jul. 18, 2013	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Feb. 28, 2019	Jan. 31, 2019	Dec. 31, 2018
6.625% Senior Notes Due 2021 [Member] \| Senior Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate		6.625%	6.625%	6.625%
Aggregate principal amount		$ 225,000,000
Debt issuance costs paid		5,039,000
Original debt issue discount		$ 1,125,000
Principal Repurchase Amount Of Exchangeable Notes							$ 250,000	$ 500,000
5.0% Exchangeable Senior Notes due March 2021 [Member] \| Exchangeable Senior Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate	5.00%		5.00%	5.00%	5.00%
Aggregate principal amount	$ 86,250,000
Debt issuance costs paid	$ 5,902,000		$ 5,902,000
Principal Repurchase Amount Of Exchangeable Notes						$ 920,000		$ 1,590,000
Other Asset Class [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value on non-recurring basis			0		$ 0
Liabilities fair value on non-recurring basis			$ 0		$ 0

Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Carrying Value [Member] \| Other Current Assets [Member]
Assets:
Derivative assets		$ 1,456
Carrying Value [Member] \| Other Current Liabilities [Member]
Liabilities:
Derivative liabilities	$ 1,188
Estimate of Fair Value Measurement [Member] \| Other Current Assets [Member]
Assets:
Derivative assets		1,456
Estimate of Fair Value Measurement [Member] \| Other Current Liabilities [Member]
Liabilities:
Derivative liabilities	1,188
Significant Other Observable Inputs (Level 2) [Member] \| Other Current Assets [Member]
Assets:
Derivative assets		$ 1,456
Significant Other Observable Inputs (Level 2) [Member] \| Other Current Liabilities [Member]
Liabilities:
Derivative liabilities	$ 1,188

Fair Value Measurements - Schedule of Fair Value of Long-term Borrowings (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Long-term Borrowings:
Carrying amount of senior notes	$ 223,242	$ 304,743
5.0% Exchangeable Senior Notes due March 2021 [Member] \| Exchangeable Senior Notes [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Long-term Borrowings:
Carrying amount of senior notes	82,706	81,959
Estimated fair value of senior notes	103,838	116,078
6.625% Senior Notes Due 2021 [Member] \| Senior Notes [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Long-term Borrowings:
Carrying amount of senior notes	223,242	222,784
Estimated fair value of senior notes	$ 218,644	$ 224,250

Borrowings - Additional Information (Detail) - USD ($)				1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
Borrowings - Additional Information (Detail) - USD ($)	Jan. 17, 2017	Jan. 17, 2017	Jul. 18, 2013	Feb. 28, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 31, 2019
Debt Instrument [Line Items]
Repurchase of common stock, shares											1,795,444
Repurchase of common stock						$ 3,000	$ 616,000	$ 2,588,000			$ 11,401,000
Loss on early extinguishment of long-term borrowings, net								(42,000)
6.625% Senior Notes Due 2021 [Member] \| Senior Notes [Member]
Debt Instrument [Line Items]
Aggregate principal amount			$ 225,000,000
Interest rate			6.625%		6.625%		6.625%		6.625%
Due date			Jul. 15, 2021				Jul. 01, 2021		Jul. 01, 2021
Aggregate principal amount of senior notes pricing			99.50%
Debt issuance costs paid			$ 5,039,000
Interest expense related to debt					$ 3,944,000	$ 3,929,000	$ 7,887,000	$ 7,859,000
Original debt issue discount			$ 1,125,000
Debt Instrument, Repurchased Face Amount										$ 500,000		$ 250,000
Loss on early extinguishment of long-term borrowings, net							$ 21,000			28,000
6.625% Senior Notes Due 2021 [Member] \| Senior Notes [Member] \| 2019 [Member]
Debt Instrument [Line Items]
Redemption price plus accrued, unpaid interest and special interest to the date of redemption							100.00%
5.0% Exchangeable Senior Notes due March 2021 [Member] \| Exchangeable Senior Notes [Member]
Debt Instrument [Line Items]
Aggregate principal amount	$ 86,250,000	$ 86,250,000
Interest rate	5.00%	5.00%			5.00%	5.00%	5.00%	5.00%	5.00%
Due date	Mar. 01, 2021						Mar. 01, 2021		Mar. 01, 2021
Aggregate principal amount of senior notes pricing		5.00%
Convertible notes principal amount denomination value							$ 1,000,000
Conversion of converted notes, shares issued							121.1387
Exchange price					$ 8.26		$ 8.26
Redemption price plus accrued, unpaid interest and special interest to the date of redemption							100.00%
Minimum required percentage of holders to declare repurchase of notes							25.00%
Percentage of notes to repurchased on declaration by minimum required holders							100.00%
Debt issuance costs paid	$ 5,902,000						$ 5,902,000
Interest expense related to the Exchangeable Notes					$ 1,425,000	$ 1,394,000	$ 2,841,000	$ 2,802,000
Debt Instrument, Repurchased Face Amount				$ 920,000						1,590,000
Loss on early extinguishment of long-term borrowings, net				$ 63,000						$ 234,000

Borrowings - Components of Long-term Borrowings (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Less: unamortized discount and debt issuance costs	$ (2,042)	$ (3,247)
Total borrowings, net	305,948	304,743
Less: current portion of long-term borrowings, net	(82,706)
Long-term borrowings, net	223,242	304,743
Exchangeable Senior Notes [Member] \| 5.0% Exchangeable Senior Notes due March 2021 [Member]
Debt Instrument [Line Items]
Long-term borrowings	83,740	83,740
Senior Notes [Member] \| 6.625% Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Long-term borrowings	$ 224,250	$ 224,250

Borrowings - Components of Long-term Borrowings (Parenthetical) (Detail)			6 Months Ended	12 Months Ended
	Jan. 17, 2017	Jul. 18, 2013	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
5.0% Exchangeable Senior Notes due March 2021 [Member] \| Exchangeable Senior Notes [Member]
Debt Instrument [Line Items]
Interest rate	5.00%		5.00%	5.00%	5.00%
Due date	Mar. 01, 2021		Mar. 01, 2021	Mar. 01, 2021
6.625% Senior Notes Due July 2021 [Member] \| Senior Notes [Member]
Debt Instrument [Line Items]
Interest rate		6.625%	6.625%	6.625%
Due date		Jul. 15, 2021	Jul. 01, 2021	Jul. 01, 2021

Accrued Severance Benefits - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2020
Percentage of employees eligible for severance benefits	98.00%
Korea [Member] \| Maximum [Member]
Retirement age of employees	60 years

Accrued Severance Benefits - Changes in Accrued Severance Benefits (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Postemployment Benefits [Abstract]
Beginning balance	$ 50,610	$ 54,553	$ 53,344	$ 55,691
Provisions	1,755	1,329	3,774	2,643
Severance payments	(1,502)	(1,799)	(3,454)	(3,295)
Translation adjustments	922	(881)	(1,879)	(1,837)
Ending balance	51,785	53,202	51,785	53,202
Less: Cumulative contributions to severance insurance deposit accounts	(1,570)	(1,099)	(1,570)	(1,099)
The National Pension Fund	(73)	(84)	(73)	(84)
Group severance insurance plan	(215)	(236)	(215)	(236)
Accrued severance benefits, net	$ 49,927	$ 51,783	$ 49,927	$ 51,783	$ 51,181

Accrued Severance Benefits - Future Benefits Payments to Employees (Detail) $ in Thousands	Jun. 30, 2020 USD ($)
Retirement Benefits [Abstract]
Remainder of 2020	$ 379
2021	401
2022	741
2023	596
2024	1,178
2025	2,104
2026 – 2030	$ 19,482

Foreign Currency Gain (Loss), Net - Additional Information (Detail) $ in Thousands	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Foreign Currency Transaction [Abstract]
Exchange rates using first base rate	1,200,700	1,157,800
Intercompany loan balances	$ 690,708	$ 686,485

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax Contingency [Line Items]
Income tax expenses (benefits)	$ 678	$ 786	$ 1,981	$ 1,582
Income tax expenses	$ 12,452	$ (7,704)	$ (17,323)	$ (28,463)
Korean Subsidiary [Member]
Income Tax Contingency [Line Items]
The net operating income carry forwards of the taxable income	60.00%	60.00%	60.00%	60.00%

- Definition

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=68072869&loc=d3e41242-110953

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
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+ Details

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References + Details

Geographic and Other Information - Additional Information (Detail)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Customer Concentration Risk [Member] \| Net Sales [Member] \| Top Ten Customers [Member] \| Standard Products Group [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	88.00%	91.00%	89.00%
Customer Concentration Risk [Member] \| Net Sales [Member] \| Top Customer One [Member] \| Standard Products Group [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	56.50%	54.80%	54.70%	50.60%
Customer Concentration Risk [Member] \| Net Sales [Member] \| Top Customer Two [Member] \| Standard Products Group [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage			10.70%
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Top Customer One [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage			48.60%		43.10%
Geographic Concentration Risk [Member] \| Net Sales [Member] \| Asia Pacific Other Than Korea [Member] \| Standard Products Group [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	82.80%		88.80%
Geographic Concentration Risk [Member] \| Net Sales [Member] \| CHINA \| Standard Products Group [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage		96.90%		95.80%
Geographic Concentration Risk [Member] \| Property, Plant and Equipment [Member] \| Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage			96.00%

Geographic and Other Information - Schedule of Operating Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Total revenues	$ 118,828	$ 140,885	$ 239,301	$ 248,152
Total gross profit	32,138	31,622	61,268	50,645
Standard Products Group [Member]
Segment Reporting Information [Line Items]
Total revenues	108,955	132,006	219,691	232,270
Total gross profit	32,138	31,622	61,268	50,645
Fab Three Foundry Services [Member]
Segment Reporting Information [Line Items]
Total revenues	9,873	8,879	19,610	15,882
Total gross profit
Operating Segments [Member] \| Standard Products Group [Member]
Segment Reporting Information [Line Items]
Total revenues	108,955	132,006	219,691	232,270
Operating Segments [Member] \| Standard Products Group [Member] \| Display Solutions [Member]
Segment Reporting Information [Line Items]
Total revenues	69,176	84,261	146,769	142,491
Operating Segments [Member] \| Standard Products Group [Member] \| Power Solutions [Member]
Segment Reporting Information [Line Items]
Total revenues	$ 39,779	$ 47,745	$ 72,922	$ 89,779

- Definition

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details

Geographic and Other Information - Net Sales by Region, Based on Location of Products are Billed (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	$ 118,828	$ 140,885	$ 239,301	$ 248,152
Standard products business [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	108,955	132,006	219,691	232,270
Standard products business [Member] \| Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	21,957	36,559	52,774	71,205
Standard products business [Member] \| Asia Pacific (Other Than Korea) [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	84,210	93,657	161,752	157,404
Standard products business [Member] \| U.S.A.[Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	1,461	656	2,170	1,118
Standard products business [Member] \| Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	856	881	1,827	2,014
Standard products business [Member] \| Others [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	$ 471	$ 253	$ 1,168	$ 529

- Definition

+ References

+ Details

Accumulated Other Comprehensive Income (Loss) - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Equity [Abstract]
Income tax related to accumulated other comprehensive loss	$ 0	$ 0	$ 0	$ 0

Accumulated Other Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Equity [Abstract]
Foreign currency translation adjustments	$ 11,503	$ (4,205)
Derivative adjustments	(1,004)	1,545
Total	$ 10,499	$ (2,660)

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References + Details

Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance beginning	$ (21,156)	$ (46,311)	$ (14,981)	$ (17,310)
Total other comprehensive income (loss)	(4,146)	7,045	13,159	14,037
Balance ending	6,175	(47,916)	6,175	(47,916)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance beginning	18,046	(12,757)	(4,205)	(20,061)
Other comprehensive income (loss) before reclassifications	(6,543)	7,680	15,708	14,984
Total other comprehensive income (loss)	(6,543)	7,680	15,708	14,984
Balance ending	11,503	(5,077)	11,503	(5,077)
Derivative Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance beginning	(3,401)	(361)	1,545	(49)
Other comprehensive income (loss) before reclassifications	2,204	(2,499)	(2,800)	(2,900)
Amounts reclassified from accumulated other comprehensive loss	193	1,864	251	1,953
Total other comprehensive income (loss)	2,397	(635)	(2,549)	(947)
Balance ending	(1,004)	(996)	(1,004)	(996)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance beginning	14,645	(13,118)	(2,660)	(20,110)
Other comprehensive income (loss) before reclassifications	(4,339)	5,181	12,908	12,084
Amounts reclassified from accumulated other comprehensive loss	193	1,864	251	1,953
Total other comprehensive income (loss)	(4,146)	7,045	13,159	14,037
Balance ending	$ 10,499	$ (6,073)	$ 10,499	$ (6,073)

- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

+ References + Details

Earnings (Loss) Per Share - Additional Information (Detail) - shares	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Conversion Of Exchangeable Notes	10,144,155	10,144,155	10,163,242

Earnings (Loss) Per Share - Schedule of Computation of Basic and Diluted Loss Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Basic earnings (loss) per share
Income (loss) from continuing operations	$ 11,774	$ (8,490)	$ (19,304)	$ (30,045)
Income (loss) from discontinued operations, net of tax	17,397	(1,030)	24,726	(13,600)
Net income (loss)	$ 29,171	$ (9,520)	$ 5,422	$ (43,645)
Basic weighted average common stock outstanding	35,092,312	34,245,127	34,992,734	34,220,141
Basic earnings (loss) per common share
Continuing operations	$ 0.34	$ (0.25)	$ (0.55)	$ (0.88)
Discontinued operations	0.50	(0.03)	0.71	(0.40)
Total	$ 0.84	$ (0.28)	$ 0.16	$ (1.28)
Diluted earnings (loss) per share
Income (loss) from continuing operations	$ 11,774	$ (8,490)	$ (19,304)	$ (30,045)
Add back: Interest expense on Exchangeable Notes	1,425
Income (loss) from continuing operations allocated to common stockholders	13,199	(8,490)	(19,304)	(30,045)
Income (loss) from discontinued operations, net of tax	17,397	(1,030)	24,726	(13,600)
Net income (loss) allocated to common stockholders	$ 30,596	$ (9,520)	$ 5,422	$ (43,645)
Basic weighted average common stock outstanding	35,092,312	34,245,127	34,992,734	34,220,141
Net effect of dilutive equity awards	1,237,770
Net effect of assumed conversion of 5.0% Exchangeable Notes to common stock	10,144,155
Diluted weighted average common stock outstanding	46,474,237	34,245,127	34,992,734	34,220,141
Continuing operations	$ 0.28	$ (0.25)	$ (0.55)	$ (0.88)
Discontinued operations	0.37	(0.03)	0.71	(0.40)
Total	$ 0.65	$ (0.28)	$ 0.16	$ (1.28)

Earnings (Loss) Per Share - Schedule of Computation of Basic and Diluted Loss Per Common Share (Parenthetical) (Detail)	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Jan. 17, 2017
5.0% Exchangeable Senior Notes due March 2021 [Member] \| Exchangeable Senior Notes [Member]
Earnings Per Share [Line Items]
Conversion of exchangeable notes to common stock rate	5.00%	5.00%	5.00%	5.00%

Earnings (Loss) Per Share - Schedule of Antidilutive Securities Excluded from the Computation of Loss Per Common Share (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Outstanding units and warrants excluded from computation of diluted loss per share/unit		10,144,155	10,144,155	10,163,242
Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Outstanding units and warrants excluded from computation of diluted loss per share/unit	699,167	2,611,832	2,075,494	2,611,832
Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Outstanding units and warrants excluded from computation of diluted loss per share/unit		501,490	1,238,639	501,490

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Other Current Assets [Member]
Loss Contingencies [Line Items]
Prepayments to suppliers	$ 5,419	$ 6,593

Subsequent Events - Additional Information (Detail) - Subsequent Event [Member] - USD ($) $ in Thousands	Jul. 20, 2020	Jul. 31, 2020
Damage From Power Outage [Member]
Description Of Temporary Power Outage Duration	9 hours and 15 minutes
Estimated power outage loss	$ 2,300
Deutsche Bank AG, Seoul Branch [Member]
Derivative, Notional Amount		$ 30,000