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Note 9 - Deferred Income (Details Textual) - USD ($) | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Deferred Revenue, Current | $ 4,362,056 | $ 4,621,438
Time and Bareboat Deferred Revenue [Member] |  |
Deferred Revenue, Current | $ 4,366,091 | $ 4,856,122

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- Definition The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6935-107765 + Details
Name: | us-gaap_DeferredRevenueCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_BalanceSheetLocationAxis=gass_TimeAndBareboatDeferredRevenueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |