Condensed Consolidated Statement of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating Activities:
Net income (loss)	$ 1,865	$ (1,111)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	1,283	1,331
Stock-based compensation	624	698
Share-based expense	0	39
(Gain) loss on disposal/sale of property and equipment	(2)	4
Payment of withholding tax on stock based compensation	(919)	(1,162)
Deferred tax provision	1,034	0
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	744	1,554
Inventories	737	664
Prepaid expenses and other assets	848	668
Accounts payable	(3,507)	312
Income taxes payable	(11)	(20)
Other accrued liabilities	(944)	(2,915)
Deferred revenue	(22)	(22)
Net cash provided by operating activities	1,730	40
Investing Activities:
Capital expenditures	(600)	(696)
Proceeds from disposal of property and equipment	2	0
Purchases of investments	(24,762)	(17,077)
Redemptions/maturities of short-term investments	21,951	16,400
Net cash used in investing activities	(3,409)	(1,373)
Financing Activities:
Proceeds from issuance of common stock	380	294
Cash dividends	(646)	(545)
Net cash used in financing activities	(266)	(251)
Net decrease in cash and cash equivalents	(1,945)	(1,584)
Effect of exchange rate changes on cash	(20)	6
Cash and cash equivalents, beginning of year	17,559	19,418
Cash and Cash Equivalents, End of Period	$ 15,594	$ 17,840