XML 71 R58.htm IDEA: XBRL DOCUMENT
v3.19.1

Derivatives and Fair Value Disclosures - Additional Information (Detail) - Interest Rate Swap [Member] |  |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Dec. 10, 2018 USD ($) | Feb. 28, 2018 USD ($) | Feb. 01, 2018 USD ($) | Jun. 02, 2017 USD ($) | Dec. 31, 2018 USD ($) DerivativeInstrument | Dec. 31, 2017 USD ($) DerivativeInstrument
Derivatives, Fair Value [Line Items] |  |  |  |  |  |
Derivative, notional amount | $ | $ 14,472,875 | $ 21,586,250 | $ 32,632,000 | $ 15,996,125 | $ 111,477,920 | $ 68,935,006
Number of instruments | DerivativeInstrument |  |  |  |  | 9 | 6
Derivative, fixed interest rate | 2.89% | 2.74% | 2.74% | 2.12% |  |
Interest rate swap, floating rate, based on libor |  |  |  |  | 2.04% |
Maturity date | Feb. 16, 2024 | Dec. 11, 2022 | Dec. 31, 2025 | May 16, 2025 |  |
Minimum [Member] |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |
Derivative, fixed interest rate |  |  |  |  | 1.52% |
Maturity date |  |  |  |  | 2020-09 |
Maximum [Member] |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |
Derivative, fixed interest rate |  |  |  |  | 2.89% |
Maturity date |  |  |  |  | 2025-12 |

X
- Definition Derivative Maturity Month And Year + References No definition available. + Details
Name: | gass_DerivativeMaturityMonthAndYear
Namespace Prefix: | gass_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Interest Rate Swap Floating Rate Based On L I B O R + References No definition available. + Details
Name: | gass_InterestRateSwapFloatingRateBasedOnLIBOR
Namespace Prefix: | gass_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
Name: | invest_DerivativeNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
Name: | us-gaap_DerivativeFixedInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Date the derivative contract matures, in CCYY-MM-DD format. + References No definition available. + Details
Name: | us-gaap_DerivativeMaturityDates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of derivative instruments of a particular group held by the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959 + Details
Name: | us-gaap_DerivativeNumberOfInstrumentsHeld
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DerivativesFairValueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |