Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
OPERATING ACTIVITIES:
Net loss	$ (10,399)	$ (6,848)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	2,148	2,587
Pension cost	86	157
Stock-based compensation expense	1,538	1,203
Gain on sale of property and equipment	0	(84)
Unrealized loss on foreign currency exchange rates	26	57
Provision for losses on accounts receivable	0	51
Provision for (recovery of) losses on inventory	17	(10)
Provision for warranties	189	139
Changes in operating assets and liabilities:
Trade and other accounts receivable	(3,432)	13,076
Inventories	1,922	(1,376)
Prepaid expenses and other assets	(453)	132
Pension asset	(155)	(139)
Accounts payable and accrued liabilities	1,571	(10,563)
Deferred revenue and customer deposits	2,626	304
Accrued employee compensation	785	(192)
Deferred tax liability	(209)	81
Other long-term liabilities	(85)	(169)
Net cash used in operating activities	(3,825)	(1,594)
INVESTING ACTIVITIES:
Purchases of property and equipment	(945)	(2,238)
Proceeds from sale of property and equipment	0	84
Net cash used in investing activities	(945)	(2,154)
FINANCING ACTIVITIES:
Principal payments on long-term debt and short-term borrowings	(10)	(11)
Proceeds from issuance of common stock under equity compensation plans	0	346
Net cash (used in) provided by financing activities	(10)	335
Effect of exchange rate changes on cash, cash equivalents and restricted cash	315	620
Decrease in cash, cash equivalents and restricted cash	(4,465)	(2,793)
Cash, cash equivalents and restricted cash, beginning of period	25,359	24,782	$ 24,782
Cash, cash equivalents and restricted cash, end of period	$ 20,894	$ 21,989	$ 25,359