Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
OPERATING ACTIVITIES:
Net loss	$ (9,205)	$ (10,399)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	1,993	2,148
Amortization of intangible assets	316	0
Non-cash interest expense	439	0
Pension and defined benefit plan cost	251	86
Stock-based compensation expense	2,624	1,538
Gain on sale of property and equipment	(4)	0
Provision for (recovery of) losses on accounts receivable	(10)	0
Provision for losses on inventory	475	17
Provision for warranties	65	189
Changes in operating assets and liabilities:
Trade and other accounts receivable	(252)	(3,406)
Inventories	(5,994)	1,922
Prepaid expenses and other assets	(455)	(453)
Pension asset	(156)	(155)
Accounts payable and accrued liabilities	309	1,571
Deferred revenue and customer deposits	(65)	2,626
Accrued employee compensation	(776)	785
Deferred tax liability	(374)	(209)
Defined benefit plan and other long-term liabilities	(392)	(85)
Net cash used in operating activities	(11,211)	(3,825)
INVESTING ACTIVITIES:
Purchases of property and equipment	(3,918)	(945)
Proceeds from sale of property and equipment	8	0
Net cash used in investing activities	(3,910)	(945)
FINANCING ACTIVITIES:
Principal payments on long-term debt and short-term borrowings	(8)	(10)
Line of credit borrowings	5,000	0
Net cash provided by (used in) financing activities	4,992	(10)
Effect of exchange rate changes on cash and cash equivalents	110	315
Decrease in cash and cash equivalents	(10,019)	(4,465)
Cash and cash equivalents, beginning of period	50,122	25,359
Cash and cash equivalents, end of period	$ 40,103	$ 20,894