Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:
Net income (loss)	$ (186)	$ 5,392	$ 2,816
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Impairment charges	4,207	0	0
Depreciation and amortization	13,228	14,308	10,392
Amortization of deferred loan costs	193	183	188
Stock-based compensation expense	6,294	6,321	5,093
Foreign currency transaction (gains) losses on short-term intercompany balances	(13)	(377)	417
Deferred income taxes	(23)	(799)	(2,151)
Changes in operating assets and liabilities, net of business acquisitions:
Restricted cash	8	(1)	0
Billed receivables	4,206	(1,598)	1,717
Unbilled receivables	2,609	(2,179)	(5,419)
Prepaid expenses and other current assets	(1,326)	693	(718)
Other assets	17	(179)	(455)
Accounts payable and accrued expenses	(3,512)	(1,125)	110
Accrued payroll and related expenses	(5,720)	(1,258)	8,289
Refund liabilities	(591)	392	(837)
Deferred revenue	(72)	(157)	(338)
Noncurrent compensation obligations	329	345	432
Other long-term liabilities	(1,224)	(1,118)	(243)
Net cash provided by operating activities	18,424	18,843	19,293
Cash flows from investing activities:
Business acquisition, net of cash acquired	0	(1,542)	(3,155)
Purchases of property and equipment, net of disposal proceeds	(6,875)	(7,931)	(8,287)
Net cash used in investing activities	(6,875)	(9,473)	(11,442)
Cash flows from financing activities:
Repayments of long-term debt	(6,000)	(3,000)	(3,000)
Payments for deferred loan costs	0	0	(6)
Payments of deferred acquisition consideration	(1,902)	(2,837)	(1,694)
Net proceeds from issuance of common stock	4,118	14,682	0
Restricted stock repurchased from employees for withholding taxes	(1,757)	(1,605)	(1,063)
Proceeds from option exercises	916	559	353
Net cash (used in) provided by financing activities	(4,625)	7,799	(5,410)
Effect of exchange rates on cash and cash equivalents	(1,030)	300	(552)
Net increase in cash and cash equivalents	5,894	17,469	1,889
Cash and cash equivalents at beginning of period	37,806	20,337	18,448
Cash and cash equivalents at end of period	43,700	37,806	20,337
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	567	340	422
Cash paid during the period for income taxes, net of refunds received	3,245	2,730	4,235
Deferred and contingent business acquisition consideration (Note 12)	$ 0	$ 189	$ 5,643