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Document And Entity Information
 12 Months Ended
Dec. 31, 2015
shares
Document and Entity Information [Abstract]  
Entity Registrant Name StealthGas Inc.
Trading Symbol gass
Document Type 20-F
Current Fiscal Year End Date --12-31
Entity Common Stock, Shares Outstanding 40,517,676
Amendment Flag false
Entity Central Index Key 0001328919
Entity Current Reporting Status Yes
Entity Voluntary Filers No
Entity Filer Category Accelerated Filer
Entity Well-known Seasoned Issuer No
Document Period End Date Dec. 31, 2015
Document Fiscal Year Focus 2015
Document Fiscal Period Focus FY