Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 8,587	$ 7,298
Short-term investments	48,968	48,987
Accounts and other receivables (net of allowances for doubtful accounts as of: March 31, 2012 and December 31, 2011 - $21)	2,962	1,487
Inventories	531	423
Deferred income taxes	215	215
Prepaid expenses and other current assets	423	479
Total current assets	61,686	58,889
Property and equipment, net	1,624	1,737
Intangibles and other assets, net	14,503	14,053
Total assets	77,813	74,679
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	1,879	365
Accrued compensation	1,764	2,830
Other current liabilities	1,915	2,054
Deferred revenue and customer advances	5,996	4,120
Total current liabilities	11,554	9,369
Long-term deferred revenue	12,450	13,229
Deferred income tax liabilities	215	215
Other long-term liabilities	588	245
Total liabilities	24,807	23,058
Contingencies (Note 13)
Stockholders' equity:
Common stock and additional paid-in capital - $0.001 par value; 100,000,000 shares authorized; shares issued: March 31, 2012 - 32,110,360 and December 31, 2011 - 31,786,030; shares outstanding: March 31, 2012 - 28,182,154 and December 31, 2011 - 27,857,824	184,131	182,508
Accumulated other comprehensive income	99	118
Accumulated deficit	(106,376)	(106,157)
Treasury stock at cost: March 31, 2012 and December 31, 2011 - 3,928,206 shares	(24,848)	(24,848)
Total stockholders' equity	53,006	51,621
Total liabilities and stockholders' equity	$ 77,813	$ 74,679