Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
9 Months Ended
Jun. 30, 2017
Aug. 11, 2017
Document And Entity Information    
Entity Registrant Name GEE Group Inc.  
Entity Central Index Key 0000040570  
Document Type 10-Q  
Document Period End Date Jun. 30, 2017  
Amendment Flag false  
Current Fiscal Year End Date --09-30  
Is Entity a Well-known Seasoned Issuer No  
Is Entity a Voluntary Filer No  
Is Entity's Reporting Status Current Yes  
Entity Filer Category Smaller Reporting Company  
Entity Common Stock, Shares Outstanding   9,878,892
Document Fiscal Period Focus Q3  
Document Fiscal Year Focus 2017