Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net income (loss)	$ (7,526)us-gaap_NetIncomeLoss	$ (186)us-gaap_NetIncomeLoss	$ 5,392us-gaap_NetIncomeLoss
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Impairment charges	0us-gaap_AssetImpairmentCharges	4,207us-gaap_AssetImpairmentCharges	0us-gaap_AssetImpairmentCharges
Depreciation and amortization	9,747	13,228	14,308
Amortization of deferred loan costs	104us-gaap_AmortizationOfFinancingCosts	193us-gaap_AmortizationOfFinancingCosts	183us-gaap_AmortizationOfFinancingCosts
Stock-based compensation expense	4,532us-gaap_ShareBasedCompensation	6,294us-gaap_ShareBasedCompensation	6,321us-gaap_ShareBasedCompensation
Foreign currency transaction (gains) losses on short-term intercompany balances	2,003	(13)	(377)
Deferred income taxes	1,566	(23)	(799)
Other loss from sale of assets	57us-gaap_GainLossOnDispositionOfAssets1	0us-gaap_GainLossOnDispositionOfAssets1	0us-gaap_GainLossOnDispositionOfAssets1
Changes in operating assets and liabilities, net of business acquisitions:
Restricted cash	4	8	(1)
Billed receivables	(6,351)	4,206	(1,598)
Unbilled receivables	7,278	2,609	(2,179)
Prepaid expenses and other current assets	1,575	(1,326)	693
Other assets	5	17	(179)
Accounts payable and accrued expenses	(3,432)	(3,512)	(1,125)
Accrued payroll and related expenses	536	(5,720)	(1,258)
Refund liabilities	(1,297)	(591)	392
Deferred revenue	720	(72)	(157)
Noncurrent compensation obligations	414	329	345
Other long-term liabilities	112	(1,224)	(1,118)
Net cash provided by operating activities	10,047	18,424	18,843
Cash flows from investing activities:
Business (acquisition) divestiture, net of cash	1,100	0	(1,542)
Purchases of property and equipment, net of disposal proceeds	(4,709)	(6,875)	(7,931)
Net cash used in investing activities	(3,609)	(6,875)	(9,473)
Cash flows from financing activities:
Repayments of long-term debt	0us-gaap_RepaymentsOfLongTermDebt	(6,000)us-gaap_RepaymentsOfLongTermDebt	(3,000)us-gaap_RepaymentsOfLongTermDebt
Payments for deferred loan costs	(104)us-gaap_PaymentsOfFinancingCosts	0us-gaap_PaymentsOfFinancingCosts	0us-gaap_PaymentsOfFinancingCosts
Payments of deferred acquisition consideration	(2,208)	(1,902)	(2,837)
Net proceeds from issuance of common stock	0	4,118	14,682
Repurchase of common stock	(22,685)	0	0
Restricted stock repurchased from employees for withholding taxes	(568)	(1,757)	(1,605)
Proceeds from option exercises	2,823	916	559
Net cash (used in) provided by financing activities	(22,742)	(4,625)	7,799
Effect of exchange rates on cash and cash equivalents	(1,661)	(1,030)	300
Net (decrease) increase in cash and cash equivalents	(17,965)	5,894	17,469
Cash and cash equivalents at beginning of period	43,700	37,806	20,337
Cash and cash equivalents at end of period	25,735	43,700	37,806
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	132us-gaap_InterestPaid	567us-gaap_InterestPaid	340us-gaap_InterestPaid
Cash paid during the period for income taxes, net of refunds received	3,892us-gaap_IncomeTaxesPaidNet	3,245us-gaap_IncomeTaxesPaidNet	2,730us-gaap_IncomeTaxesPaidNet
Deferred and contingent business acquisition consideration	$ 0	$ 0	$ 189

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

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- Definition

The cash inflow from the additional capital contribution to the entity.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (j)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

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- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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