Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities
Net income (loss)	$ 5,226	$ (2,654)
Adjustments to reconcile net income to net cash from operating activities
Depreciation and amortization	4,369	5,075
Amortization of debt costs and other assets	375	360
Provision for doubtful accounts	(35)	532
Deferred income taxes	277	5,074
Share-based compensation	3,916	2,816
Other-than-temporary impairment on debt securities		5,585
Gain on valuation of equity securities	(1,629)
Other	208	242
Changes in operating assets and liabilities
Accounts receivable	(4,925)	(2,074)
Inventories	1,664	(2,750)
Prepaid expenses and other current assets	2,166	(203)
Accounts payable	(4,459)	1,014
Other current liabilities	(11,310)	(23,253)
Other long-term assets and liabilities	597	(663)
Net cash from operating activities	(3,560)	(10,899)
Cash flows from investing activities
Capital expenditures for property, plant and equipment	(2,831)	(3,721)
Capital expenditures for intangible assets	(607)	(184)
Purchase of intangible assets and other investments	(1,217)
Other investing activities		474
Net cash from investing activities	(4,655)	(3,431)
Cash flows from financing activities
Proceeds from issuance of common shares	4,378	3,876
Payments related to withholdings for share-based compensation	(516)	(2,079)
Payment of debt issuance costs	(165)
Net cash from financing activities	3,697	1,797
Effect of exchange rate changes on cash	417	244
Net change in cash, cash equivalents, and restricted cash	(4,101)	(12,289)
Cash, cash equivalents, and restricted cash at the beginning of the period	81,157	53,941
Cash, cash equivalents, and restricted cash at the end of the period	77,056	$ 41,652
Noncash activities:
Purchase of intangible assets	$ 1,181