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Vessel Operating Expenses - Vessel Operating Expenses (Detail) - USD ($) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Vessel Operating Expenses [Abstract] |  |  |
Crew wages and related costs | $ 38,454,397 | $ 32,073,496 | $ 30,874,618
Insurance | 2,196,444 | 1,889,041 | 2,162,523
Repairs and maintenance | 7,282,481 | 6,590,006 | 5,677,033
Spares and consumable stores | 9,123,975 | 7,990,022 | 7,783,902
Miscellaneous expenses | 4,452,266 | 4,752,656 | 3,088,018
Total | $ 61,509,563 | $ 53,295,221 | $ 49,586,094

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- Definition Other vessel operating expenses. + References No definition available. + Details
Name: | gass_OtherVesselOperatingExpenses
Namespace Prefix: | gass_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Repairs and maintenance expense. + References No definition available. + Details
Name: | gass_RepairsAndMaintenanceExpense
Namespace Prefix: | gass_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Spares and consumable stores expense. + References No definition available. + Details
Name: | gass_SparesAndConsumableStoresExpense
Namespace Prefix: | gass_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Vessel operating expenses. + References No definition available. + Details
Name: | gass_VesselOperatingExpensesAbstract
Namespace Prefix: | gass_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Vessel operating expenses including related party + References No definition available. + Details
Name: | gass_VesselOperatingExpensesIncludingRelatedParty
Namespace Prefix: | gass_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The expense in the period incurred with respect to protection provided by insurance entities against risks other than risks associated with production (which are allocated to cost of sales). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 + Details
Name: | us-gaap_GeneralInsuranceExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of expense for salary, wage, profit sharing; incentive and equity-based compensation; and other employee benefit. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(4)) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 + Details
Name: | us-gaap_LaborAndRelatedExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration