Condensed Consolidated Balance Sheets (unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 63,183	$ 61,637
Accounts receivable, net of allowance of $351 in both 2013 and 2012	32,383	33,959
Deferred tax assets - current portion	7,742	3,589
Prepaid expenses and other current assets	4,692	3,413
Total current assets	108,000	102,598
Property and equipment, net	4,953	3,898
Deferred tax assets - non-current portion	11,343	16,471
Other non-current assets	2,171	1,293
Total assets	126,467	124,260
Current liabilities:
Accounts payable	1,347	2,054
Accrued compensation and related benefits	5,886	10,723
Accrued and other current liabilities	2,018	2,882
Deferred revenues	3,763	3,232
Billings in excess of recognized revenues	648	807
Total current liabilities	13,662	19,698
Non-current liabilities	3,267	3,502
Total liabilities	16,929	23,200
Commitments and contingencies (Note 10)
Stockholders’ equity:
Preferred stock, $0.00015 par value, 5,000 shares authorized, no shares issued and outstanding	0	0
Common stock, $0.00015 par value, 70,000 shares authorized: shares issued 34,290 and 34,027, respectively; shares outstanding 29,503 and 29,226, respectively	4	4
Additional paid-in-capital	224,129	220,361
Treasury stock at cost, 4,787 and 4,801 shares, respectively	(27,630)	(27,778)
Accumulated deficit	(86,847)	(91,578)
Accumulated other comprehensive income (loss)	(118)	51
Total stockholders’ equity	109,538	101,060
Total liabilities and stockholders’ equity	$ 126,467	$ 124,260