Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
OPERATING ACTIVITIES:
Net loss	$ (17,620)	$ (9,205)
Less: Income from discontinued operations, net of income taxes	0	(1,309)
Loss from continuing operations	(17,620)	(10,514)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	1,768	1,635
Amortization of intangible assets	302	316
Operating lease cost	382	0
Non-cash interest expense	495	439
Defined benefit plan cost	181	184
Stock-based compensation expense	2,091	2,374
Gain on sale of property and equipment	0	(4)
Provision for (recovery of) losses on accounts receivable	12	(10)
Provision for losses on inventory	551	472
Provision for warranties	110	64
Changes in operating assets and liabilities:
Trade and other accounts receivable	1,749	(2,843)
Inventories	(3,867)	(4,338)
Prepaid expenses and other assets	237	(60)
Accounts payable and accrued liabilities	5,150	1,041
Deferred revenue and other current liabilities	315	78
Accrued employee compensation	(251)	(643)
Operating lease liabilities	(549)	0
Deferred tax liability	32	46
Defined benefit plan and other long-term liabilities	(121)	(359)
Net cash used in operating activities - continuing operations	(9,033)	(12,122)
Net cash provided by operating activities - discontinued operations	0	911
Net cash provided by operating activities - discontinued operations	(9,033)	(11,211)
INVESTING ACTIVITIES:
Purchases of property and equipment	(702)	(2,599)
Proceeds from sale of property and equipment	0	8
Net cash used in investing activities - continuing operations	(702)	(2,591)
Net cash used in investing activities - discontinued operations	0	(1,319)
Total net cash used in investing activities	(702)	(3,910)
FINANCING ACTIVITIES:
Payments related to finance lease	(232)	0
Line of credit borrowings	0	5,000
Net cash provided by (used in) financing activities - continuing operations	(232)	5,000
Net cash used in financing activities - discontinued operations	0	(8)
Total net cash provided by (used in) financing activities	(232)	4,992
Effect of exchange rate changes on cash and cash equivalents	67	110
Decrease in cash and cash equivalents	(9,900)	(10,019)
Cash and cash equivalents, beginning of period - continuing operations	58,028	46,192
Cash and cash equivalents, beginning of period - discontinued operations	0	3,930
Cash and cash equivalents, end of period	48,128	40,103
Cash and cash equivalents, end of period - discontinued operations	0	3,766
Cash and cash equivalents, end of period - continuing operations	$ 48,128	$ 36,337