Condensed Consolidated Balance Sheets (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 14,509	$ 12,243
Short-term investments	48,979	48,961
Accounts and other receivables (net of allowances for doubtful accounts as of: September 30, 2011 - $25 and December 31, 2010 - $97)	779	815
Inventories	579	406
Deferred income taxes	342	342
Prepaid expenses and other current assets	704	3,821
Total current assets	65,892	66,588
Property and equipment, net	1,279	1,931
Intangibles and other assets, net	13,771	12,356
Total assets	80,942	80,875
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	550	393
Accrued compensation	2,722	3,507
Other current liabilities	1,129	1,488
Deferred revenue and customer advances	4,459	4,429
Total current liabilities	8,860	9,817
Long-term deferred revenue	14,010	16,494
Deferred income tax liabilities	342	342
Other long-term liabilities	455	538
Total liabilities	23,667	27,191
Commitments and Contingencies (Notes 9 and 16)
Stockholders' equity:
Common stock and additional paid-in capital - $0.001 par value; 100,000,000 shares authorized; shares issued: September 30, 2011 - 31,760,085 and December 31, 2010 - 31,016,812; shares outstanding: September 30, 2011 - 28,940,662 and December 31, 2010 - 28,228,603	181,609	176,515
Accumulated other comprehensive income	139	120
Accumulated deficit	(105,887)	(104,553)
Treasury stock at cost: September 30, 2011 - 2,819,423 shares and December 31, 2010 - 2,788,209 shares	(18,586)	(18,398)
Total stockholders' equity	57,275	53,684
Total liabilities and stockholders' equity	$ 80,942	$ 80,875