Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 88,227	$ 83,558
Accounts and unbilled receivables, net of allowance of $XXX and $1,130, respectively	37,553	38,801
Prepaid and other current assets	6,041	5,067
Total current assets	131,821	127,426
Restricted cash	329	329
Property and equipment, net	14,838	12,788
Other long term assets, net	5,759	5,936
Total assets	152,747	146,479
Current liabilities:
Accounts payable	4,532	3,775
Accrued liabilities	4,129	3,258
Accrued payroll and other employee benefits	4,828	7,669
Deferred revenue	36,013	39,774
Total current liabilities	49,502	54,476
Long-term deferred revenue	3,149	2,007
Other Liabilities, Noncurrent	1,010	1,327
Total liabilities	53,661	57,810
Stockholders' equity:
Preferred stock, $0.001 par value, 5,000,000 shares authorized none issued	0	0
Common stock, $0.001 par value, 75,000,000 shares authorized, XXX and 31,432,430 shares issued, respectively, XXX and 27,014,845 shares outstanding, respectively	32	32
Additional paid-in capital	95,795	87,693
Treasury stock, 4,417,585 common shares, at cost	(13,938)	(13,938)
Retained earnings	17,197	14,882
Total stockholders' equity	99,086	88,669
Total liabilities and stockholders' equity	$ 152,747	$ 146,479