Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities
Net loss	$ (65,124)	$ (34,591)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization	9,780	10,321
Long-lived asset impairment charges	39,597
Net loss on disposal of assets	22	665
Stock-based compensation	939	1,081
Deferred taxes	(584)	(363)
Changes in operating assets and liabilities:
Accounts receivable	5,047	(2,251)
Inventories	(2,177)	11,330
Other inventory supplies	1,146	3,404
Prepaid expenses and other assets	304	(483)
Accounts payable	(910)	(401)
Accrued payroll	(296)	256
Corporate income and franchise taxes	(70)	4
Advanced payments	27	(402)
Accrued and other current liabilities	394	(60)
Net cash used in operating activities	(11,905)	(11,490)
Cash flows from investing activities
Purchases of property and equipment	(801)	(6,127)
Proceeds from disposal of assets		15
Purchases of investments	(3,099)	(28,359)
Proceeds from sale of investments	11,000	15,000
Net cash provided by (used in) investing activities	7,100	(19,471)
Cash flows from financing activities
Proceeds from issuance of common stock, net of issuance costs		34,957
Proceeds from exercise of options	4	212
Cash used to settle net equity awards	16
Restricted cash	(8)	(30)
Net cash provided by financing activities	12	35,139
Net effect of currency translation	1,868	(105)
Net (decrease) increase in cash and cash equivalents	(2,925)	4,073
Cash and cash equivalents, beginning of period	24,353	21,071
Cash and cash equivalents, end of period	$ 21,428	$ 25,144