Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Operating Activities
Net loss	$ (1,654)us-gaap_NetIncomeLoss	$ (1,086)us-gaap_NetIncomeLoss
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation	520us-gaap_Depreciation	493us-gaap_Depreciation
Amortization	543us-gaap_AdjustmentForAmortization	196us-gaap_AdjustmentForAmortization
Gain on disposal of equipment	(25)	0
Allowance for doubtful accounts	10us-gaap_ProvisionForDoubtfulAccounts	85us-gaap_ProvisionForDoubtfulAccounts
Deferred income taxes	(226)us-gaap_DeferredIncomeTaxExpenseBenefit	305us-gaap_DeferredIncomeTaxExpenseBenefit
Stock-based compensation	272us-gaap_ShareBasedCompensation	424us-gaap_ShareBasedCompensation
Changes in operating assets and liabilities:
Accounts receivable	4,882	1,059
Inventories	(536)us-gaap_IncreaseDecreaseInInventories	(474)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses, other current assets and other non-current assets	(35)	(446)
Accounts payable	(937)	(409)
Accrued liabilities and other non-current liabilities	(1,699)	(1,988)
Net cash provided by (used in) operating activities	1,115	(1,841)
Investing Activities
Purchases of property, equipment and patents	(276)	(322)
Proceeds from the sale of equipment	25	0
Net cash used in investing activities	(251)	(322)
Financing Activities
Payments on short-term borrowings	(815)us-gaap_RepaymentsOfShortTermDebt	0us-gaap_RepaymentsOfShortTermDebt
Proceeds from exercises of stock options	0	160
Excess tax benefit from exercises of stock options	0	12
Treasury shares withheld	(173)us-gaap_PaymentsForRepurchaseOfEquity	(261)us-gaap_PaymentsForRepurchaseOfEquity
Net cash used in financing activities	(988)	(89)
Effect of exchange rate fluctuations on cash	(203)	(568)
Net decrease in cash and cash equivalents	(327)	(2,820)
Cash and cash equivalents at beginning of period	18,637	27,738
Cash and cash equivalents at end of period	$ 18,310	$ 24,918

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