Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 48,559	$ 38,744
Accounts receivable, less allowance for doubtful accounts of $499 and $400 as of March 31, 2012 and December 31, 2011, respectively	14,655	13,340
Income tax receivable	2,780	3,625
Deposits	402	278
Prepaid expenses and other current assets	2,444	2,123
Deferred tax assets	1,755	1,754
Total current assets	70,595	59,864
Deposits, less current portion	807	776
Deferred tax assets, less current portion	344	344
Restricted cash	3,097	3,103
Property and equipment, net	3,674	3,557
Intangible assets, net	616	704
Total assets	79,133	68,348
Current liabilities:
Accounts payable	22,420	21,731
Accrued expenses	12,010	6,311
Deferred revenue	2,316	2,168
Income tax payable	0	279
Deferred rent	99	114
Total current liabilities	36,845	30,603
Long-term tax liabilities	2,276	2,225
Deferred rent, less current portion	712	761
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.01 par value per share (5,000 shares authorized; none issued)
Common stock, $0.01 par value (40,000 shares authorized; 16,462 shares issued and 15,962 shares outstanding as of March 31, 2012 and December 31, 2011)	164	164
Treasury stock (at cost, 500 shares at December 31, 2011)	0	(15,123)
Additional paid-in capital	7,943	7,656
Retained earnings	32,108	43,484
Accumulated other comprehensive loss	(915)	(1,422)
Total stockholders' equity	39,300	34,759
Total liabilities and stockholders' equity	$ 79,133	$ 68,348