Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
3 Months Ended
Dec. 31, 2019
Feb. 10, 2020
Document And Entity Information    
Entity Registrant Name GEE Group Inc.  
Entity Central Index Key 0000040570  
Document Type 10-Q  
Amendment Flag false  
Current Fiscal Year End Date --09-30  
Entity Small Business true  
Entity Shell Company false  
Entity Emerging Growth Company false  
Entity Current Reporting Status Yes  
Document Period End Date Dec. 31, 2019  
Entity Filer Category Non-accelerated Filer  
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2020  
Entity Common Stock Shares Outstanding   14,056,997
EntityFileNumber 1-05707  
EntityAddressAddressLine1 7751 Belfort Parkway, Suite 150  
EntityAddressPostalZipCode 32256  
EntityTaxIdentificationNumber 366097429  
EntityAddressCityOrTown Jacksonville, FL  
LocalPhoneNumber 954-0400  
CityAreaCode 630  
EntityAddressStateOrProvince ILLINOIS