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Note 10 - Long-term Debt (Details) - Summary of Long-term Debt (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Note 10 - Long-term Debt (Details) - Summary of Long-term Debt [Line Items]
Balance	$ 325,503,853us-gaap_LongTermDebt	$ 352,868,622us-gaap_LongTermDebt
Additions	81,950,000us-gaap_ProceedsFromIssuanceOfDebt
Repayments	(109,314,769)us-gaap_RepaymentsOfDebt
Current portion of long-term debt	42,614,213us-gaap_LongTermDebtCurrent	41,263,165us-gaap_LongTermDebtCurrent
Long term debt	282,889,640us-gaap_LongTermDebtNoncurrent	311,605,457us-gaap_LongTermDebtNoncurrent
Term Loan 1 [Member]
Note 10 - Long-term Debt (Details) - Summary of Long-term Debt [Line Items]
Original Amount	100,067,500us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = gass_TermLoan1Member
Balance	13,816,882us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan1Member	34,012,031us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan1Member
Repayments	(20,195,149)us-gaap_RepaymentsOfDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan1Member
Maturity Date	Sep. 09, 2016
Term Loan 2 [Member]
Note 10 - Long-term Debt (Details) - Summary of Long-term Debt [Line Items]
Original Amount	79,850,000us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = gass_TermLoan2Member
Balance	14,500,000us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan2Member	18,500,000us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan2Member
Repayments	(4,000,000)us-gaap_RepaymentsOfDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan2Member
Maturity Date	May 30, 2016
Term Loan 3 [Member]
Note 10 - Long-term Debt (Details) - Summary of Long-term Debt [Line Items]
Original Amount	6,580,000us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = gass_TermLoan3Member
Balance	1,763,440us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan3Member	2,237,200us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan3Member
Repayments	(473,760)us-gaap_RepaymentsOfDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan3Member
Maturity Date	Jun. 28, 2016
Term Loan 4 [Member]
Note 10 - Long-term Debt (Details) - Summary of Long-term Debt [Line Items]
Original Amount	49,875,000us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = gass_TermLoan4Member
Balance	22,365,764us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan4Member	26,444,014us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan4Member
Repayments	(4,078,250)us-gaap_RepaymentsOfDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan4Member
Maturity Date	Dec. 21, 2017
Term Loan 5 [Member]
Note 10 - Long-term Debt (Details) - Summary of Long-term Debt [Line Items]
Original Amount	40,250,000us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = gass_TermLoan5Member
Balance	21,875,000us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan5Member	24,375,000us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan5Member
Repayments	(2,500,000)us-gaap_RepaymentsOfDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan5Member
Maturity Date	Feb. 19, 2020
Term Loan 6 [Member]
Note 10 - Long-term Debt (Details) - Summary of Long-term Debt [Line Items]
Original Amount	33,240,000us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = gass_TermLoan6Member
Balance	21,606,000us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan6Member	23,545,000us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan6Member
Repayments	(1,939,000)us-gaap_RepaymentsOfDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan6Member
Maturity Date	Nov. 04, 2020
Term Loan 7 [Member]
Note 10 - Long-term Debt (Details) - Summary of Long-term Debt [Line Items]
Original Amount	29,437,000us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = gass_TermLoan7Member
Balance	8,650,000us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan7Member	9,430,000us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan7Member
Repayments	(780,000)us-gaap_RepaymentsOfDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan7Member
Maturity Date	Oct. 09, 2020
Term Loan 8 [Member]
Note 10 - Long-term Debt (Details) - Summary of Long-term Debt [Line Items]
Original Amount	45,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = gass_TermLoan8Member
Balance	30,550,000us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan8Member	33,950,000us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan8Member
Repayments	(3,400,000)us-gaap_RepaymentsOfDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan8Member
Maturity Date	Jul. 15, 2016
Term Loan 9 [Member]
Note 10 - Long-term Debt (Details) - Summary of Long-term Debt [Line Items]
Original Amount	32,200,000us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = gass_TermLoan9Member
Balance	19,300,000us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan9Member	21,102,095us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan9Member
Additions	20,400,000us-gaap_ProceedsFromIssuanceOfDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan9Member
Repayments	(22,202,095)us-gaap_RepaymentsOfDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan9Member
Maturity Date	Apr. 14, 2020
Term Loan 10 [Member]
Note 10 - Long-term Debt (Details) - Summary of Long-term Debt [Line Items]
Original Amount	29,250,000us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = gass_TermLoan10Member
Balance		20,520,000us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan10Member
Repayments	(20,520,000)us-gaap_RepaymentsOfDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan10Member
Maturity Date	Jul. 14, 2019
Term Loan 11 [Member]
Note 10 - Long-term Debt (Details) - Summary of Long-term Debt [Line Items]
Original Amount	26,700,000us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = gass_TermLoan11Member
Balance	12,915,000us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan11Member	15,278,928us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan11Member
Additions	14,250,000us-gaap_ProceedsFromIssuanceOfDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan11Member
Repayments	(16,613,928)us-gaap_RepaymentsOfDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan11Member
Maturity Date	Apr. 16, 2020
Term Loan 12 [Member]
Note 10 - Long-term Debt (Details) - Summary of Long-term Debt [Line Items]
Original Amount	49,400,000us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = gass_TermLoan12Member
Balance	37,850,000us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan12Member	41,150,000us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan12Member
Repayments	(3,300,000)us-gaap_RepaymentsOfDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan12Member
Maturity Date	Sep. 01, 2018
Term Loan 13 [Member]
Note 10 - Long-term Debt (Details) - Summary of Long-term Debt [Line Items]
Original Amount	43,250,000us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = gass_TermLoan13Member
Balance	35,375,000us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan13Member	38,375,000us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan13Member
Repayments	(3,000,000)us-gaap_RepaymentsOfDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan13Member
Maturity Date	Jun. 20, 2020
Term Loan 14 [Member]
Note 10 - Long-term Debt (Details) - Summary of Long-term Debt [Line Items]
Original Amount	45,212,500us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = gass_TermLoan14Member
Balance	38,896,767us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan14Member	43,949,354us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan14Member
Repayments	(5,052,587)us-gaap_RepaymentsOfDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan14Member
Maturity Date	Sep. 30, 2020
Term Loan 15 [Member]
Note 10 - Long-term Debt (Details) - Summary of Long-term Debt [Line Items]
Original Amount	50,550,000us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = gass_TermLoan15Member
Balance	33,040,000us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan15Member
Additions	34,300,000us-gaap_ProceedsFromIssuanceOfDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan15Member
Repayments	(1,260,000)us-gaap_RepaymentsOfDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan15Member
Maturity Date	Jun. 30, 2021
Term Loan 16 [Member]
Note 10 - Long-term Debt (Details) - Summary of Long-term Debt [Line Items]
Original Amount	13,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = gass_TermLoan16Member
Balance	13,000,000us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan16Member
Additions	$ 13,000,000us-gaap_ProceedsFromIssuanceOfDebt / us-gaap_DebtInstrumentAxis = gass_TermLoan16Member
Maturity Date	Oct. 02, 2020

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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