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

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