CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets
Cash and cash equivalents	$ 58,944	$ 75,326
Short-term investments	19,301	9,897
Accounts receivable, net of allowance for doubtful accounts of $142 and $85, respectively	26,568	22,748
Deferred tax asset	3,687	7,390
Prepaid expenses and other current assets	3,252	3,218
Total current assets	111,752	118,579
Property and equipment, net	7,853	7,283
Deferred tax asset	2,486	1,280
Goodwill	17,959	17,959
Other intangible assets, net	2,768	6,771
Other assets	358	352
Total assets	143,176	152,224
Current liabilities
Accounts payable	3,436	3,282
Deferred revenue	38,045	46,429
Other accrued liabilities	9,521	9,600
Total current liabilities	51,002	59,311
Deferred revenue, less current portion	5,885	8,088
Other liabilities	1,330	1,893
Total liabilities	58,217	69,292
Commitments and contingencies (Note 10)	0	0
Stockholders’ equity
Preferred stock: $0.001 par value; 10,000 shares authorized; no shares issued and outstanding at December 31, 2012 and 2011, respectively	0	0
Common stock: $0.001 par value; 100,000 shares authorized; 24,902 and 24,370 shares issued and outstanding at December 31, 2012 and 2011, respectively	25	24
Additional paid-in capital	134,682	129,238
Accumulated other comprehensive loss	(1)	(2)
Accumulated deficit	(49,747)	(46,328)
Total stockholders’ equity	84,959	82,932
Total liabilities and stockholders’ equity	$ 143,176	$ 152,224