CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets
Cash and cash equivalents	$ 72,237	$ 75,326
Short-term investments	9,695	9,897
Accounts receivable, net of allowance for doubtful accounts of $71 and $85, respectively	22,371	22,748
Deferred tax asset	7,390	7,390
Prepaid expenses and other current assets	4,719	3,218
Total current assets	116,412	118,579
Property and equipment, net	8,240	7,283
Deferred tax asset	631	1,280
Goodwill	17,959	17,959
Other intangible assets, net	4,762	6,771
Other assets	333	352
Total assets	148,337	152,224
Current liabilities
Accounts payable	2,406	3,282
Deferred revenue	44,133	46,429
Other accrued liabilities	8,144	9,600
Total current liabilities	54,683	59,311
Deferred revenue, less current portion	7,399	8,088
Other liabilities	1,521	1,893
Total liabilities	63,603	69,292
Commitments and contingencies (Note 9)	0	0
Stockholders' equity
Preferred stock: $0.001 par value; 10,000 shares authorized; no shares issued and outstanding atJune 30, 2012 and December 31, 2011	0	0
Common stock: $0.001 par value; 100,000 shares authorized; 24,761 and 24,370 shares issued and outstanding at June 30, 2012 and December 31, 2011, respectively	25	24
Additional paid-in capital	132,879	129,238
Accumulated other comprehensive loss	(5)	(2)
Accumulated deficit	(48,165)	(46,328)
Total stockholders' equity	84,734	82,932
Total liabilities and stockholders' equity	$ 148,337	$ 152,224