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Note 5 - Advances for Vessels Under Construction and Acquisitions (Details) (USD $) | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
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Note 5 - Advances for Vessels Under Construction and Acquisitions (Details) [Line Items] |  |  |
(in Dollars) | $ 88,965,085 gass_AdvancesForVesselsUnderConstructionAndAcquisitions | $ 70,577,435 gass_AdvancesForVesselsUnderConstructionAndAcquisitions | $ 19,321,045 gass_AdvancesForVesselsUnderConstructionAndAcquisitions
Number of Vessels Under Construction | 16 gass_NumberOfVesselsUnderConstruction |  |
LPG Carriers Contracted in 2012 from Seller [Member] |  |  |
Note 5 - Advances for Vessels Under Construction and Acquisitions (Details) [Line Items] |  |  |
Number of Vessels Under Construction | 2 gass_NumberOfVesselsUnderConstruction / us-gaap_PropertyPlantAndEquipmentByTypeAxis = gass_LPGCarriersContractedIn2012FromSellerMember | 4 gass_NumberOfVesselsUnderConstruction / us-gaap_PropertyPlantAndEquipmentByTypeAxis = gass_LPGCarriersContractedIn2012FromSellerMember |
LPG Carriers Contracted in 2013 from Seller [Member] |  |  |
Note 5 - Advances for Vessels Under Construction and Acquisitions (Details) [Line Items] |  |  |
Number of Vessels Under Construction | 3 gass_NumberOfVesselsUnderConstruction / us-gaap_PropertyPlantAndEquipmentByTypeAxis = gass_LPGCarriersContractedIn2013FromSellerMember | 5 gass_NumberOfVesselsUnderConstruction / us-gaap_PropertyPlantAndEquipmentByTypeAxis = gass_LPGCarriersContractedIn2013FromSellerMember |
LPG Carriers Contracted in 2013 from Ship-Builder [Member] |  |  |
Note 5 - Advances for Vessels Under Construction and Acquisitions (Details) [Line Items] |  |  |
Number of Vessels Under Construction | 4 gass_NumberOfVesselsUnderConstruction / us-gaap_PropertyPlantAndEquipmentByTypeAxis = gass_LPGCarriersContractedIn2013FromShipBuilderMember | 6 gass_NumberOfVesselsUnderConstruction / us-gaap_PropertyPlantAndEquipmentByTypeAxis = gass_LPGCarriersContractedIn2013FromShipBuilderMember |
LPG Carriers Contracted in 2014 from Ship-builders [Member] |  |  |
Note 5 - Advances for Vessels Under Construction and Acquisitions (Details) [Line Items] |  |  |
Number of Vessels Under Construction | 6 gass_NumberOfVesselsUnderConstruction / us-gaap_PropertyPlantAndEquipmentByTypeAxis = gass_LPGCarriersContractedIn2014FromShipBuildersMember |  |
LPG Carriers Contracted in 2014 from Sellers [Member] |  |  |
Note 5 - Advances for Vessels Under Construction and Acquisitions (Details) [Line Items] |  |  |
Number of Vessels Under Construction | 1 gass_NumberOfVesselsUnderConstruction / us-gaap_PropertyPlantAndEquipmentByTypeAxis = gass_LPGCarriersContractedIn2014FromSellersMember |  |

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- Definition Advance payments to ship-builders for vessels under construction or payments to sellers for new vessels. + References No definition available. + Details
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