Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net income	$ 5,595	$ 3,747
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	716	627
Deferred income tax	193	0
Stock-based compensation	307	287
Provision for losses on accounts receivable	95	108
Net foreign currency effect	94	(35)
Changes in operating assets and liabilities:
Accounts receivable	(2,036)	(1,271)
Deposits	(155)	(132)
Income tax receivable	1,564	845
Prepaid expenses and other current assets	350	(295)
Accounts payable	(549)	460
Accrued expenses	850	5,619
Deferred revenue	(517)	134
Deferred rent	(110)	(75)
Income tax payable	0	(284)
Other non-current liabilities	103	52
Net cash provided by operating activities	6,500	9,787
Cash flows from investing activities:
Purchases of property and equipment	(900)	(678)
Net cash used in investing activities	(900)	(678)
Cash flows from financing activities:
Net cash used in financing activities	0	0
Effect of exchange rate changes on cash and cash equivalents	(1,662)	706
Net increase in cash and cash equivalents	3,938	9,815
Cash and cash equivalents at beginning of period	61,169	38,744
Cash and cash equivalents at end of period	65,107	48,559
Supplemental disclosure of cash flow information:
Cash paid for income taxes, net	$ 10	$ 2,309