Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating Activities
Net loss	$ (1,086)	$ (21)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	493	538
Amortization	196	211
Allowance for doubtful accounts	85	207
Deferred income taxes	305	161
Stock-based compensation	424	329
Changes in operating assets and liabilities:
Accounts receivable	1,059	(7,494)
Inventories	(474)	(90)
Prepaid expenses, other current assets and other non-current assets	(446)	986
Accounts payable	(409)	(1,106)
Accrued liabilities and other non-current liabilities	(1,988)	(2,121)
Net cash used in operating activities	(1,841)	(8,400)
Investing Activities
Purchases of property, equipment and patents	(322)	(555)
Net cash used in investing activities	(322)	(555)
Financing Activities
Proceeds from exercises of stock options	160	0
Excess tax benefit from exercises of stock options	12	0
Treasury shares withheld	(261)	(101)
Net cash used in financing activities	(89)	(101)
Effect of exchange rate fluctuations on cash	(568)	(240)
Net decrease in cash and cash equivalents	(2,820)	(9,296)
Cash and cash equivalents at beginning of period	27,738	24,453
Cash and cash equivalents at end of period	$ 24,918	$ 15,157