Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net loss	$ (2,771)	$ (3,029)
Adjustments to reconcile net loss to cash used in operating activities:
Depreciation and amortization	118	224
Stock-based compensation expense	413	180
Loss (gain) on change in fair value of liability-classified warrants	(796)	529
Gain on foreign currency transactions	(391)	(589)
Other	44	(22)
Changes in operating assets and liabilities:
Accounts receivable	(1,151)	(1,617)
Inventories	1,060	(27)
Prepaid expenses and other assets	(161)	(17)
Accounts payable, accrued expenses and other current liabilities	1,753	658
Income taxes	5	723
Net cash used in operating activities	(1,877)	(2,987)
Cash flows from investing activities:
Purchases of property and equipment	(109)	(131)
Net cash used in investing activities	(109)	(131)
Cash flows from financing activities:
Net borrowings under demand line of credit	596	264
Proceeds from exercise of warrants	10
Net cash provided by financing activities	606	264
Effect of exchange rates on cash	18	(116)
Net change in cash	(1,362)	(2,970)
Cash at beginning of period	2,958	7,220
Cash at end of period	$ 1,596	$ 4,250