Basis of Presentation (Policies)	9 Months Ended
Basis of Presentation (Policies)	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
New Accounting Standards	New Accounting Standards A summary of the new accounting standards issued by the Financial Accounting Standards Board (“FASB”) and included in the Accounting Standards Codification (“ASC”) that apply to PRGX is set forth below: FASB ASC Update No. 2017-04 - In January 2017, the FASB issued Accounting Standards Update 2017-04, Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. The standard removes the second step of the two step test used to determine an impairment of goodwill. Under the new standard, an entity only compares the fair value of the reporting unit to the carrying amount, including goodwill, and records the amount of goodwill impairment as the excess of a reporting unit's carrying amount over its fair value, not to exceed the total amount of goodwill allocated to the reporting unit. The standard will become effective for the Company beginning January 1, 2020. The Company is currently assessing the impact adoption of this standard will have on its consolidated results of operations, financial condition, cash flows, and financial statement disclosures. FASB ASC Update No. 2016-02 - In February 2016, the FASB issued Accounting Standards Update 2016-02, Leases (Topic 842). The standard requires the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition. The standard requires lessors to classify leases as either sales-type, finance or operating. A sales-type lease occurs if the lessor transfers all of the risks and rewards, as well as control of the underlying asset, to the lessee. If risks and rewards are conveyed without the transfer of control, the lease is treated as a financing lease. If the lessor does not convey risks and rewards or control, an operating lease results. The standard will become effective for the Company beginning January 1, 2019. The Company is currently assessing the impact adoption of this standard will have on its consolidated results of operations, financial condition, cash flows, and financial statement disclosures. FASB ASC Update No. 2014-9 and additional updates - In May 2014, the FASB issued an accounting standards update with new guidance on recognizing revenue from contracts with customers. The standards update outlines a single comprehensive model for an entity to utilize to recognize revenue when it transfers goods or services to customers in an amount that reflects the consideration that will be received in exchange for the goods and services. Additional disclosures will also be required to enable users to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. In 2016, the FASB issued accounting standards updates to address implementation issues and to clarify the guidance for identifying performance obligations, licenses and determining if a company is the principal or agent in a revenue arrangement. The standard will become effective for the Company beginning January 1, 2018. We are continuing to work towards establishing policies, updating our processes and implementing necessary changes to data and processes to be able to comply with the new requirements. Based on the results of our assessment to date, we do not expect that the new standard will result in significant changes to our revenue recognition. Our initial evaluation is that revenue from our Recovery Audit segments, which is a majority of our revenues, would not be materially impacted by the adoption of this standard. While we are continuing to assess all potential impacts of the standard, we currently believe the most significant impact relates to additional disclosures related to qualitative and quantitative information concerning the nature, amount, timing, and any uncertainty of revenue and cash flows from contracts with customers, the capitalization of costs of commissions, upfront contract costs, and other contract acquisition-based and contract fulfillment costs on the consolidated balance sheets. We will continue our evaluation of the standards update through the date of adoption.
Fair Value of Financial Instruments	Fair Value of Financial Instruments We state cash equivalents at cost, which approximates fair market value. The carrying values for receivables from clients, unbilled receivables, accounts payable, deferred revenue and other accrued liabilities reasonably approximate fair market value due to the nature of the financial instrument and the short-term maturity of these items. We record bank debt, if any, as of the period end date based on the effective borrowing rate and repayment terms when originated. As of September 30, 2017, we had $13.6 million in bank debt outstanding, and we had no bank debt outstanding as of September 30, 2016. We believe the carrying value of the bank debt approximates its fair value. We considered the factors used in determining the fair value of this debt to be Level 3 inputs (significant unobservable inputs). We had $4.0 million of business acquisition obligations as of September 30, 2017, and no such obligations as of September 30, 2016. Our business acquisition obligations represent the estimated fair value of the deferred consideration and projected earn-out payments due as of the end of the recording period. We determine the estimated fair value of business acquisition obligations based on our projections of future revenue and profits or other factors used in the calculation of the ultimate payment(s) to be made. The discount rate that we use to value the liability is based on specific business risk, cost of capital, and other factors. We consider these factors to be Level 3 inputs (significant unobservable inputs). We state certain assets at fair value on a nonrecurring basis as required by GAAP. Generally, these assets are recorded at fair value on a nonrecurring basis as a result of impairment charges.
Income Taxes	Income Taxes Reported income tax expense in each period primarily results from taxes on the income of foreign subsidiaries. The effective tax rates generally differ from the expected tax rate due primarily to the Company’s deferred tax asset valuation allowance on the domestic earnings and taxes on income of foreign subsidiaries. Significant judgment is required in evaluating our uncertain tax positions and determining our provision for income taxes. In addition, we are subject to the continuous examination of our income tax returns by the Internal Revenue Service in the U.S. and other tax authorities. We regularly assess the likelihood of adverse outcomes resulting from these examinations to determine the adequacy of our provision for income taxes. We apply a “more-likely-than-not” recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. We refer to GAAP for guidance on derecognition, classification, interest and penalties, accounting in interim periods, disclosure, and transition. In accordance with FASB ASC 740, our policy for recording interest and penalties associated with tax positions is to record such items as a component of income before income taxes. A number of years may elapse before a particular tax position is audited and finally resolved or when a tax assessment is raised. The number of years subject to tax assessments also varies by tax jurisdiction.

Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.