Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating Activities
Net (loss)	$ (5,265)	$ (3,025)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation	926	1,049
Amortization	861	1,075
Loss (Gain) on disposal of equipment	26	(26)
Allowance for doubtful accounts	151	0
Deferred income taxes	(10)	(167)
Stock-based compensation	1,041	833
Changes in operating assets and liabilities:
Accounts receivable	173	2,378
Inventories	149	(279)
Prepaid expenses, other current assets and other non-current assets	2,861	183
Accounts payable	(1,630)	1,674
Accrued liabilities and other non-current liabilities	(1,482)	(5,002)
Net cash (used in) provided by operating activities	(2,199)	(1,307)
Investing Activities
Purchases of property, equipment and patents	(302)	(383)
Proceeds from the sale of equipment	1	26
Net cash (used in) investing activities	(301)	(357)
Financing Activities
Change in restricted cash	(7,020)	0
Payments on short-term borrowings	0	(1,636)
Treasury shares withheld	(172)	(252)
Net cash (used in) financing activities	(7,192)	(1,888)
Effect of exchange rate fluctuations on cash	434	(118)
Net decrease in cash and cash equivalents	(9,258)	(3,670)
Cash and cash equivalents at beginning of period	21,684	18,637
Cash and cash equivalents at end of period	$ 12,426	$ 14,967