CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Operating Activities:
NET INCOME (LOSS)	$ 2,030	$ (1,209)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Loss from discontinued operations	109	1,098
Depreciation and amortization	2,554	2,217
Stock-based compensation	1,721	1,638
(Gain) loss on disposal/sale of property and equipment	(1)	4
Restructuring costs	126	0
Payment of withholding tax on stock based compensation	(943)	(1,190)
Deferred tax provision	1,045	0
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	255	(240)
Inventories	1,501	166
Prepaid expenses and other assets	913	804
Accounts payable	(4,833)	439
Income taxes payable	4	306
Other accrued liabilities	(1,609)	(2,592)
Deferred revenue	99	38
Net cash provided by operating activities	2,971	1,479
Investing Activities:
Capital expenditures	(1,281)	(1,669)
Proceeds from disposal of property and equipment	1	0
Purchases of investments	(38,830)	(26,319)
Redemptions/maturities of short-term investments	39,275	37,478
Purchase of assets/businesses, net of cash acquired	0	(931)
Net cash provided by (used in) investing activities	(835)	8,559
Financing Activities:
Proceeds from issuance of common stock	383	294
Payments for repurchase of common stock	(435)	0
Cash dividends	(1,289)	(1,097)
Net cash used in financing activities	(1,341)	(803)
Cash flows from discontinued operations:
Net cash (used in) provided by operating activities	(17)	(864)
Net cash provided by investing activities	1	1
Net cash provided by financing activities	0	0
Net decrease in cash and cash equivalents	779	8,372
Effect of exchange rate changes on cash	(8)	0
Cash and cash equivalents, beginning of year	17,543	19,418
Cash and Cash Equivalents, End of Period	$ 18,330	$ 27,790