Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Operating activities:
Net loss	$ (668)	$ (808)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation	142	125
Amortization	408	411
Stock-based compensation	97	94
Deferred income taxes		64
Changes in operating assets and liabilities:
Accounts receivable, net	2,172	530
Inventories	625	(482)
Prepaid expenses and other receivables	22	(213)
Accounts payable	(1,252)	(1,033)
Accrued liabilities	(209)	(710)
Income taxes payable	(37)	(42)
Net cash provided by (used in) operating activities	1,300	(2,064)
Investing activities:
Payment of earn-outs		(2,361)
Purchases of marketable securities	(2,901)
Sales and maturities of marketable securities	2,183	313
Purchases of property and equipment	(281)	(158)
Net cash used in investing activities	(999)	(2,206)
Financing activities:
Proceeds from exercise of stock options	3	35
Net cash provided by financing activities	3	35
Effect of exchange rate changes on cash	206	315
Increase in cash and cash equivalents	510	(3,920)
Cash and cash equivalents at beginning of period	5,224	8,021
Cash and cash equivalents at end of period	$ 5,734	$ 4,101