Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities
Net loss	$ (9,691)	$ (50,655)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization	12,252	13,667
Provision for severance benefits	9,827	11,877
Amortization of debt issuance costs and original issue discount	347	324
Loss (gain) on foreign currency, net	(1,140)	17,146
Restructuring gain	(7,785)
Stock-based compensation	1,504	1,977
Other	164	1,544
Changes in operating assets and liabilities
Accounts receivable, net	8,505	3,145
Inventories, net	(11,946)	1,623
Other receivables	(3,635)	5,523
Other current assets	2,123	2,235
Deferred tax assets	37	339
Accounts payable	7,779	(12,431)
Other accounts payable	(5,156)	(5,550)
Accrued expenses	1,913	(10,710)
Other current liabilities	(1,364)	(699)
Deferred revenue	1,477	(1,359)
Other non-current liabilities	(661)	(1,084)
Payment of severance benefits	(13,102)	(4,231)
Other	(137)	(147)
Net cash used in operating activities	(8,689)	(27,466)
Cash flows from investing activities
Proceeds from settlement of hedge collateral	5,917
Payment of hedge collateral		(6,555)
Purchase of plant, property and equipment	(5,834)	(1,964)
Payment for intellectual property registration	(478)	(263)
Collection of guarantee deposits	383
Payment of guarantee deposits	(11)	(642)
Other	11	237
Net cash used in investing activities	(12)	(9,187)
Cash flows from financing activities
Proceeds from issuance of common stock		1,208
Net cash provided by financing activities		1,208
Effect of exchange rates on cash and cash equivalents	1,733	5,683
Net decrease in cash and cash equivalents	(6,968)	(29,762)
Cash and cash equivalents
Beginning of the period	90,882	102,434
End of the period	83,914	72,672
Supplemental cash flow information
Cash paid for interest	7,453	7,683
Cash paid for income taxes	469	388
Non-cash operating activities
Insurance proceeds in restricted cash reclassified from other receivables (Note 17)	(29,571)
Non-cash investing activities
Property, plant and equipment additions in other accounts payable	$ 993	$ 1,493