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Document And Entity Information - shares
 12 Months Ended
Dec. 31, 2016
Mar. 21, 2017
Document Information [Line Items]    
Entity Registrant Name GeoVax Labs, Inc.  
Entity Central Index Key 0000832489  
Trading Symbol govx  
Current Fiscal Year End Date --12-31  
Entity Filer Category Smaller Reporting Company  
Entity Current Reporting Status Yes  
Entity Voluntary Filers No  
Entity Well-known Seasoned Issuer No  
Entity Common Stock, Shares Outstanding (in shares)   56,218,567
Document Type POS AM  
Document Period End Date Dec. 31, 2016  
Document Fiscal Year Focus 2016  
Document Fiscal Period Focus FY  
Amendment Flag true  
Amendment Description This Post-Effective Amendment No. 2 to Form S-1 (this “Post-Effective Amendment”) is being filed pursuant to Section 10(a)(3) of the Securities Act to update our registration statement on Form S-1 (Registration No. 333-208549) (the “Registration Statement”), which was previously declared effective by the Securities and Exchange Commission on April 8, 2015, to (i) include the consolidated financial statements and the notes thereto for the fiscal year ended December 31, 2016, and (ii) update certain other information in the Registration Statement. No additional securities are being registered under this Post-Effective Amendment. All applicable registration fees were paid at the time of the original filing of the Registration Statement. As permitted by Rule 429, this Post-Effective Amendment includes a combined prospectus intended for use to offer shares pursuant to (1) the Registration Statement, (2) Form S-1 (SEC Reg. No. 333-202897) and (3) Form S-1 (SEC Reg No. 333-206617).