Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
OPERATING ACTIVITIES:
Net loss	$ (20,507)	$ (20,517)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	4,007	4,407
Amortization of intangible assets	630	202
Non-cash interest expense	891	0
Loss on lease due to restructuring	(86)	0
Pension and defined benefit plan cost	499	277
Stock-based compensation expense	5,371	3,792
Gain on sale of property and equipment	(4)	0
Provision for (recovery of) losses on accounts receivable	(10)	2
Provision for losses on inventory	665	828
Provision for warranties	160	209
Changes in operating assets and liabilities:
Trade and other accounts receivable	1,945	(6,773)
Inventories	(10,887)	6,057
Prepaid expenses and other assets	66	(599)
Pension asset	(308)	(305)
Accounts payable and accrued liabilities	(4,136)	4,714
Deferred revenue and customer deposits	(1,923)	1,351
Accrued employee compensation	(1,444)	240
Deferred tax liability	(380)	(190)
Defined benefit plan and other long-term liabilities	(550)	(197)
Net cash used in operating activities	(26,001)	(6,502)
INVESTING ACTIVITIES:
Purchases of property and equipment	(7,847)	(2,060)
Proceeds from sale of property and equipment	8	0
Cash used in acquisition, net of cash acquired	0	(97)
Proceeds from sale of product line	0	1,500
Net cash used in investing activities	(7,839)	(657)
FINANCING ACTIVITIES:
Principal payments on long-term debt and short-term borrowings	(17)	(17)
Line of credit borrowings	5,000	0
Proceeds from issuance of common stock under equity compensation plans	229	194
Net cash provided by financing activities	5,212	177
Effect of exchange rate changes on cash and cash equivalents	53	804
Decrease in cash and cash equivalents	(28,575)	(6,178)
Cash and cash equivalents, beginning of period	50,122	25,359
Cash and cash equivalents, end of period	$ 21,547	$ 19,181