Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities
Net loss	$ (40,343)	$ (65,124)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization	4,919	9,780
Net loss on disposal of assets	126	22
Long-lived asset impairment charges	10,481	39,597
Stock-based compensation	1,081	939
Deferred taxes	(554)	(584)
Changes in operating assets and liabilities:
Accounts receivable	(240)	5,047
Inventories	5,067	(3,087)
Inventory reserves	5,964	910
Other inventory supplies	638	1,146
Prepaid expenses and other assets	1,638	304
Accounts payable	(1,045)	(910)
Accrued payroll	1,265	(296)
Corporate income and franchise taxes	(42)	(70)
Advanced payments	457	27
Accrued and other current liabilities	(891)	394
Net cash used in operating activities	(11,479)	(11,905)
Cash flows from investing activities
Purchases of property and equipment	(595)	(801)
Proceeds from disposal of assets	190
Purchases of investments	(24)	(3,099)
Proceeds from sale of investments	8,924	11,000
Net cash provided by investing activities	8,495	7,100
Cash flows from financing activities
Net change in short-term borrowings	(1,500)
Proceeds from exercise of options		4
Taxes paid related to net share settlement of equity awards	(1)
Cash used to settle net equity awards		(8)
Restricted cash	(6)	16
Net cash (used in) provided by financing activities	(1,507)	12
Net effect of currency translation	(355)	1,868
Net decrease in cash and cash equivalents	(4,846)	(2,925)
Cash and cash equivalents, beginning of period	21,216	24,353
Cash and cash equivalents, end of period	$ 16,370	$ 21,428