v3.7.0.1
Document and Entity Information - shares
6 Months Ended
Jun. 30, 2017
Aug. 08, 2017
Document Documentand Entity Information [Abstract]    
Entity Registrant Name Performant Financial Corporation  
Entity Central Index Key 0001550695  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Document Type 10-Q  
Document Period End Date Jun. 30, 2017  
Document Fiscal Year Focus 2017  
Document Fiscal Period Focus (Q1,Q2,Q3,FY) Q2  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   50,797,652