Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash flows from operating activities:
Net income (loss)	$ (2,374)	$ 78
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization of property and equipment	327	485
Amortization, impairment and abandonment of intangibles	734	692
Stock-based compensation	1,538	1,765
Allowance (recovery) for doubtful accounts	12	(20)
Loss on disposal of equipment	18	3
Gain on sales of discontinued operations	(153)	(61)
Changes in operating assets and liabilities:
Accounts and other receivables	(1,273)	(464)
Inventories	20	(42)
Prepaid expenses and other current assets	(264)	3,204
Other assets	(25)	(54)
Accounts payable	1,149	250
Accrued compensation and other current liabilities	(532)	(1,602)
Deferred revenue and customer advances	(502)	(1,071)
Other long-term liabilities	359	(33)
Net cash provided by (used in) operating activities	(966)	3,130
Cash flows provided by (used in) investing activities:
Purchases of available-for-sale investments	(29,956)	(29,927)
Proceeds from maturities of available-for-sale investments	35,000	30,000
Additions to intangibles	(1,466)	(1,522)
Purchases of property and equipment	(868)	(39)
Proceeds from sales of discontinued operations	250	100
Net cash provided by (used in) investing activities	2,960	(1,388)
Cash flows provided by (used in) financing activities:
Issuance of common stock under employee stock purchase plan	51	65
Exercise of stock options	941	1,849
Purchase of treasury stock	(1,887)	0
Net cash provided by (used in) financing activities	(895)	1,914
Net increase in cash and cash equivalents	1,099	3,656
Cash and cash equivalents:
Beginning of the period	7,298	12,243
End of the period	8,397	15,899
Supplemental disclosure of cash flow information:
Cash paid (received) for taxes	18	(3,320)
Supplemental disclosure of non-cash operating, investing, and financing activities:
Amounts accrued for property and equipment, and intangibles	644	630
Amounts accrued for purchase of treasury stock	161	0
Issuance of shares from Employee Stock Purchase Plan and Release of Restricted Stock Units and Awards under company stock plan	$ 1,259	$ 1,257