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Note 6 - Vessels, Net (Details) - Summary of Vessels, Net (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Summary of Vessels, Net [Abstract] |  |  |
Balance, December 31 | $ 895,387,989 us-gaap_PropertyPlantAndEquipmentGross | $ 849,452,594 us-gaap_PropertyPlantAndEquipmentGross | $ 776,302,690 us-gaap_PropertyPlantAndEquipmentGross
Balance, December 31 | (184,035,144)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | (172,429,692)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | (141,668,019)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Balance, December 31 | 711,352,845 us-gaap_PropertyPlantAndEquipmentNet | 677,022,902 us-gaap_PropertyPlantAndEquipmentNet | 634,634,671 us-gaap_PropertyPlantAndEquipmentNet
Acquisitions (transfer from Advances for Vessels under Construction) | 101,459,533 us-gaap_PropertyPlantAndEquipmentAdditions | 73,149,904 us-gaap_PropertyPlantAndEquipmentAdditions |
Disposals | (39,075,007)us-gaap_PropertyPlantAndEquipmentDisposals |  |
Disposals | 11,925,771 us-gaap_AccumulatedDepreciationDepletionAndAmortizationSaleOfPropertyPlantAndEquipment1 |  |
Disposals | (27,149,236)gass_PropertyPlantAndEquipmentDisposalsNet |  |
Impairment loss | (16,449,131)gass_ImpairmentOfLongLivedAssetsHeldForUseBeforeConsideringEffectOnAccumulatedDepreciation |  |
Impairment loss | 10,280,384 gass_AccumulatedDepreciationDepletionAndAmortizationImpairmentOfPropertyPlantAndEquipment |  |
Impairment loss | (6,168,747)us-gaap_ImpairmentOfLongLivedAssetsHeldForUse | 0 us-gaap_ImpairmentOfLongLivedAssetsHeldForUse | 0 us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
Depreciation for the year | $ (33,811,607)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipmentExcludingCapitalLeasedAssets | $ (30,761,673)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipmentExcludingCapitalLeasedAssets |

X
- Definition Amount of decrease in accumulated depreciation, depletion and amortization as a result of the impairment of property, plant and equipment. + References No definition available. + Details
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- Definition Represents the impairment of long-lived assets held for use, before considering the effects on accumulated depreciation. + References No definition available. + Details
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- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land or leased assets). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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- Definition The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=51824106&loc=d3e2420-110228 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51719941&loc=d3e2921-110230 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 225 -Section 45 -Paragraph 11 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51659069&loc=d3e92212-112881 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Impairment -URI http://asc.fasb.org/extlink&oid=6515133 + Details
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