Consolidated Balance Sheets (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 25,301	$ 32,584
Short-term investments	21,148	17,550
Accounts receivable, net of allowance for doubtful accounts of $1,185 and $1,026 as of September 30, 2011 and December 31, 2010, respectively	27,100	24,678
Prepaid expenses and other current assets	2,000	1,021
Deferred tax assets	1,245	729
Total current assets	76,794	76,562
Property and equipment, net	7,836	6,235
Long-term investments	9,844	0
Goodwill	92,528	92,382
Intangible assets, net of accumulated amortization	9,336	10,469
Deferred tax assets	7,907	7,985
Other assets	207	125
Total assets	204,452	193,758
Current liabilities:
Accounts payable	3,662	3,797
Accrued expenses and other current liabilities	3,812	2,181
Accrued compensation expenses	1,006	1,979
Income taxes payable	0	226
Deferred revenue	7,948	6,603
Total current liabilities	16,428	14,786
Long-term liabilities:
Other liabilities	4,471	5,112
Total liabilities	20,899	19,898
Commitments and contingencies (Note 9)
Stockholders' equity:
Preferred stock, 5,000,000 shares authorized; no shares issued or outstanding
Common stock, $0.001 par value per share, 100,000,000 shares authorized, 43,660,157 shares issued and 37,802,279 shares outstanding at September 30, 2011 and 42,901,926 shares issued and 37,044,048 shares outstanding at December 31, 2010	44	43
Treasury stock	(35,343)	(35,343)
Additional paid-in capital	253,137	246,080
Accumulated other comprehensive (loss) income	(64)	5
Accumulated deficit	(34,221)	(36,925)
Total stockholders' equity	183,553	173,860
Total liabilities and stockholders' equity	$ 204,452	$ 193,758