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Stock-Based Compensation (Details Textual) (USD $)
In Millions, except Share data, unless otherwise specified
 3 Months Ended 0 Months Ended 1 Months Ended 33 Months Ended
Mar. 31, 2015
compensation_plan
Mar. 31, 2014
Mar. 30, 2015
Jun. 19, 2012
Jun. 30, 2012
Mar. 31, 2015
Stock-Based Compensation (Textual) [Abstract]            
Number of stock-based compensation plans 2prgx_SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofSharebasedCompensationPlans          
Selling, general and administrative expenses $ 1.1us-gaap_AllocatedShareBasedCompensationExpense $ 1.0us-gaap_AllocatedShareBasedCompensationExpense        
Unrecognized stock-based compensation expense related to stock options 14.9us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized         14.9us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Weighted-average period for recognizing stock compensation expense 1 year 9 months 0 days          
2008 Equity Incentive Plan [Member]            
Stock-Based Compensation (Textual) [Abstract]            
Stock options expiration period 7 years          
Employee Group [Member] | 2008 Equity Incentive Plan [Member]            
Stock-Based Compensation (Textual) [Abstract]            
Stock options vesting period 3 years 3 years        
Director [Member] | 2008 Equity Incentive Plan [Member]            
Stock-Based Compensation (Textual) [Abstract]            
Stock options vesting period 1 year          
Performance Shares [Member] | 2008 Equity Incentive Plan [Member]            
Stock-Based Compensation (Textual) [Abstract]            
Total of performance units were outstanding (shares)     1,325,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_EquityIncentivePlanMember		      
Number of executive officers granted stock awards     8prgx_NumberofExecutiveOfficersGrantedStockAwards
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_EquityIncentivePlanMember		      
Percentage of performance units in equity (percent)     50.00%prgx_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformanceUnitsSettlementInCommonStockPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_EquityIncentivePlanMember		      
Percentage of performance units in cash (percent)     50.00%prgx_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformanceUnitsSettlementInCashPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_EquityIncentivePlanMember		      
Performance period     2 years      
Performance Shares [Member] | 2008 Equity Incentive Plan [Member] | Threshold performance level [Member]            
Stock-Based Compensation (Textual) [Abstract]            
Performance level percentage     35.00%prgx_SharebasedCompensationArrangementbySharebasedPaymentAwardPerformanceLevelPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_EquityIncentivePlanMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheOneMember		      
Performance Shares [Member] | 2008 Equity Incentive Plan [Member] | Target performance level [Member]            
Stock-Based Compensation (Textual) [Abstract]            
Performance level percentage     100.00%prgx_SharebasedCompensationArrangementbySharebasedPaymentAwardPerformanceLevelPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_EquityIncentivePlanMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheTwoMember		      
Performance Shares [Member] | 2008 Equity Incentive Plan [Member] | Maximum performance level [Member]            
Stock-Based Compensation (Textual) [Abstract]            
Performance level percentage     200.00%prgx_SharebasedCompensationArrangementbySharebasedPaymentAwardPerformanceLevelPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_EquityIncentivePlanMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheThreeMember		      
Performance Shares [Member] | 2006 Management Incentive Plan [Member]            
Stock-Based Compensation (Textual) [Abstract]            
Stock options vesting period 3 years          
Total of performance units were outstanding (shares) 10,330us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_ManagementIncentivePlanMember		     154,264us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_ManagementIncentivePlanMember		   10,330us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_ManagementIncentivePlanMember
Number of executive officers granted stock awards       7prgx_NumberofExecutiveOfficersGrantedStockAwards
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_ManagementIncentivePlanMember		    
Grant date fair value awards         1.2prgx_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodAggregateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_ManagementIncentivePlanMember		  
Percentage of performance units in equity (percent)       60.00%prgx_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformanceUnitsSettlementInCommonStockPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_ManagementIncentivePlanMember		    
Percentage of performance units in cash (percent)       40.00%prgx_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformanceUnitsSettlementInCashPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_ManagementIncentivePlanMember		    
Performance units settled in period (shares) 6,200prgx_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsSettledinPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_ManagementIncentivePlanMember		 0prgx_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsSettledinPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_ManagementIncentivePlanMember		       127,410prgx_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsSettledinPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_ManagementIncentivePlanMember
Number of executive officers that settled performance units in period (executive officers) 2prgx_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsSettledinPeriodExecutiveOfficers
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_ManagementIncentivePlanMember		          
Number of former executive officers that settled performance units in period (executive officers) 4prgx_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsSettledinPeriodFormerExecutiveOfficers
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_ManagementIncentivePlanMember		          
Performance units forfeited in period (shares) 16,524us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_ManagementIncentivePlanMember		          
Number of former executive officers that forfeited performance units in period (executive officer) 1prgx_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsForfeitedinPeriodFormerExecutiveOfficers
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_ManagementIncentivePlanMember		          
Common stock issued during period (shares) 3,720us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_ManagementIncentivePlanMember		         73,158us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_ManagementIncentivePlanMember
Cash payments for shares settled during period $ 0.1prgx_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsCashPaymentsforSharesSettledDuringPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_ManagementIncentivePlanMember		         $ 0.3prgx_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsCashPaymentsforSharesSettledDuringPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= prgx_ManagementIncentivePlanMember
Restricted Stock and Restricted Stock Units [Member] | 2008 Equity Incentive Plan [Member]            
Stock-Based Compensation (Textual) [Abstract]            
Stock options award vesting right vest in equal annual increments over the vesting period          
Restricted Stock and Restricted Stock Units [Member] | Employee Group [Member]            
Stock-Based Compensation (Textual) [Abstract]            
Stock options vesting period 3 years          
Restricted Stock and Restricted Stock Units [Member] | Employee Group [Member] | 2008 Equity Incentive Plan [Member]            
Stock-Based Compensation (Textual) [Abstract]            
Stock options vesting period 2 years [1] 2 years        
Restricted Stock and Restricted Stock Units [Member] | Director group 1 [Member]            
Stock-Based Compensation (Textual) [Abstract]            
Stock options vesting period 1 year          
Restricted Stock and Restricted Stock Units [Member] | Director [Member] | 2008 Equity Incentive Plan [Member]            
Stock-Based Compensation (Textual) [Abstract]            
Stock options vesting period 1 year          
Stock Options [Member] | 2008 Equity Incentive Plan [Member]            
Stock-Based Compensation (Textual) [Abstract]            
Stock options expiration period 7 years          
Stock options award vesting right vest in equal annual increments over the vesting period          
Stock Options [Member] | Employee Group [Member] | 2008 Equity Incentive Plan [Member]            
Stock-Based Compensation (Textual) [Abstract]            
Stock options vesting period 3 years          
Stock Options [Member] | Director [Member] | 2008 Equity Incentive Plan [Member]            
Stock-Based Compensation (Textual) [Abstract]            
Stock options vesting period 1 year          
[1] (1)The Company granted nonvested performance-based stock awards (restricted stock units) in the first quarter of 2015 to eight executive officers.