Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
OPERATING ACTIVITIES:
Net loss	$ (34,377)	$ (11,536)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	6,638	7,416
Amortization of intangible assets	502	0
Non-cash interest expense	24	0
Loss on lease due to restructuring	179	87
Pension and defined benefit plan cost	520	479
Stock-based compensation expense	6,547	3,759
Gain on sale of property and equipment	(20)	(131)
Impairment of property and equipment	0	155
Gain on sale of product line	0	(6,657)
Unrealized (gain) loss on foreign currency exchange rates	(8)	45
Release of tax liability	0	(1,518)
Provision for losses on accounts receivable	4	56
Provision for losses on inventory	1,669	226
Provision for warranties	605	444
Changes in operating assets and liabilities:
Trade and other accounts receivable	(3,654)	20,151
Inventories	3,626	(7,209)
Prepaid expenses and other assets	145	(1,288)
Pension asset	(502)	(441)
Accounts payable and accrued liabilities	7,293	(16,704)
Deferred revenue and customer deposits	1,817	11
Accrued employee compensation	1,190	(962)
Deferred tax liability	(981)	113
Other long-term liabilities	7	(479)
Net cash used in operating activities	(8,776)	(13,983)
INVESTING ACTIVITIES:
Purchases of property and equipment	(3,315)	(4,689)
Proceeds from sale of property and equipment	20	133
Cash used in acquisition, net of cash acquired	(97)	0
Proceeds from sale of product line	1,500	20,486
Net cash provided by (used in) investing activities	(1,892)	15,930
FINANCING ACTIVITIES:
Principal payments on long-term debt and short-term borrowings	(24)	(33)
Proceeds from long-term debt and short-term borrowings, net of discount and issuance costs	37,333	0
Proceeds from issuance of common stock under equity compensation plans	193	618
Net cash provided by financing activities	37,502	585
Effect of exchange rate changes on cash, cash equivalents and restricted cash	659	588
Increase in cash, cash equivalents and restricted cash	27,493	3,120
Cash, cash equivalents and restricted cash, beginning of period	25,359	24,782
Cash, cash equivalents and restricted cash, end of period	$ 52,852	$ 27,902