Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities:
Net loss	$ (5,364)	$ (1,334)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization of property and equipment	490	717
Amortization, impairment and abandonment of intangibles	1,071	1,016
Stock-based compensation	2,346	2,705
Allowance (recovery) for doubtful accounts	113	(25)
Loss on disposal of equipment	27	3
Gain on sales of discontinued operations	(153)	(61)
Changes in operating assets and liabilities:
Accounts and other receivables	(28)	61
Inventories	64	(173)
Prepaid expenses and other current assets	(294)	3,117
Other assets	(45)	(89)
Accounts payable	1,214	32
Accrued compensation and other current liabilities	622	(1,282)
Deferred revenue and customer advances	(1,699)	(2,454)
Other long-term liabilities	339	(56)
Net cash provided by (used in) operating activities	(1,297)	2,177
Cash flows provided by (used in) investing activities:
Purchases of available-for-sale investments	(29,956)	(44,910)
Proceeds from maturities of available-for-sale investments	45,000	45,000
Additions to intangibles	(2,323)	(2,406)
Purchases of property and equipment	(931)	(84)
Proceeds from sales of discontinued operations	250	100
Net cash provided by (used in) investing activities	12,040	(2,300)
Cash flows provided by (used in) financing activities:
Issuance of common stock under employee stock purchase plan	122	145
Exercise of stock options	974	2,244
Purchase of treasury stock	(5,248)	0
Net cash provided by (used in) financing activities	(4,152)	2,389
Net increase in cash and cash equivalents	6,591	2,266
Cash and cash equivalents:
Beginning of the period	7,298	12,243
End of the period	13,889	14,509
Supplemental disclosure of cash flow information:
Cash paid (received) for taxes	21	(3,302)
Supplemental disclosure of non-cash operating, investing, and financing activities:
Amounts accrued for property and equipment, and intangibles	647	636
Issuance of shares from Employee Stock Purchase Plan and Release of Restricted Stock Units and Awards under company stock plan	$ 1,298	$ 1,305