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Note 6 - Vessels, Net (Details) (USD $) | 12 Months Ended | 2 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2014 | Nov. 14, 2014 | Dec. 15, 2014
Note 6 - Vessels, Net (Details) [Line Items] |  |  |  |  |  |
Impairment of Long-Lived Assets Held-for-use | $ 6,168,747 us-gaap_ImpairmentOfLongLivedAssetsHeldForUse | $ 0 us-gaap_ImpairmentOfLongLivedAssetsHeldForUse | $ 0 us-gaap_ImpairmentOfLongLivedAssetsHeldForUse |  |  |
Disposal Group, Including Discontinued Operation, Assets, Current | 0 us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent | 0 us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent |  | 0 us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent |  |
Gas Premiership [Member] |  |  |  |  |  |
Note 6 - Vessels, Net (Details) [Line Items] |  |  |  |  |  |
Disposal Group, Including Discontinued Operation, Consideration |  |  |  |  | (28,500,000)us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration / us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis = gass_GasPremiershipMember |
Gas Cathar [Member] |  |  |  |  |  |
Note 6 - Vessels, Net (Details) [Line Items] |  |  |  |  |  |
Disposal Group, Including Discontinued Operation, Consideration |  |  |  |  |  | $ (28,500,000)us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration / us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis = gass_GasCatharMember
Gas Premiership and Gas Cathar [Member] |  |  |  |  |  |
Note 6 - Vessels, Net (Details) [Line Items] |  |  |  |  |  |
Sale Leaseback Transaction, Term of Lease |  |  |  | 4 years |  |

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