Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
12 Months Ended
Sep. 30, 2019
Dec. 20, 2019
Mar. 31, 2019
Document And Entity Information      
Entity Registrant Name GEE Group Inc.    
Entity Central Index Key 0000040570    
Document Type 10-K    
Amendment Flag false    
Entity Voluntary Filers No    
Current Fiscal Year End Date --09-30    
Entity Well Known Seasoned Issuer No    
Entity Small Business true    
Entity Shell Company true    
Entity Emerging Growth Company false    
Entity Current Reporting Status Yes    
Document Period End Date Sep. 30, 2019    
Entity Filer Category Non-accelerated Filer    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2019    
Entity Common Stock Shares Outstanding   13,089,703  
Entity Public Float     $ 11,350,222