Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 65,107	$ 61,169
Accounts receivable, less allowance for doubtful accounts of $582 and $498 as of March 31, 2013 and December 31, 2012, respectively	15,303	13,626
Income tax receivable	5,117	6,682
Deposits	398	389
Prepaid expenses and other current assets	2,187	2,260
Deferred tax assets	2,426	2,194
Total current assets	90,538	86,320
Deposits, less current portion	1,208	1,107
Deferred tax assets, less current portion	1,240	1,710
Restricted cash	3,252	3,396
Property and equipment, net	5,316	4,314
Intangible assets, net	796	986
Total assets	102,350	97,833
Current liabilities:
Accounts payable	26,909	28,695
Accrued expenses	12,796	11,993
Deferred revenue	2,158	2,698
Income tax payable	559	0
Deferred rent	262	280
Total current liabilities	42,684	43,666
Long-term tax liabilities	10,133	10,030
Deferred rent, less current portion	1,510	798
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.01 par value per share (5,000 shares authorized; none issued)	0	0
Common stock, $0.01 par value (40,000 shares authorized; 15,801 shares issued and 15,362 shares outstanding as of March 31, 2013 and December 31, 2012)	163	163
Treasury stock (at cost, 438 shares at March 31, 2013 and December 31, 2012)	(7,898)	(7,898)
Additional paid-in capital	9,169	8,863
Retained earnings	48,543	42,948
Accumulated other comprehensive loss	(1,954)	(737)
Total stockholders' equity	48,023	43,339
Total liabilities and stockholders' equity	$ 102,350	$ 97,833