Represents the additional amount for the amount of stock repurchase plan authorized.

No definition available.

Name:	gass_AdditionalAmountOfStockRepurchaseProgramAuthorizedAmount
Namespace Prefix:	gass_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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Namespace Prefix:	gass_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

This item represents a delivery installment for vessels delivered.

+ References

No definition available.

+ Details

Name:	gass_PaymentInstallmentForVesselDelivery
Namespace Prefix:	gass_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

+ Details

Name:	us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The estimated or actual value of the asset at the end of its useful life or when it is no longer serviceable (cannot be used for its original purpose).

+ References

No definition available.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentSalvageValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

Name:	us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Total cost of shares repurchased divided by the total number of shares repurchased.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

+ Details

Name:	us-gaap_TreasuryStockSharesAcquired
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
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Period Type:

Note 19 - Subsequent Events (Details) (USD $)	1 Months Ended	12 Months Ended					0 Months Ended					3 Months Ended
Note 19 - Subsequent Events (Details) (USD $)	Nov. 26, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Apr. 22, 2015	Jan. 09, 2015	Mar. 12, 2015	Apr. 14, 2015	Mar. 27, 2015	Apr. 15, 2015	Feb. 26, 2015
Note 19 - Subsequent Events (Details) [Line Items]
Treasury Stock Acquired, Average Cost Per Share (in Dollars per share)	$ 6.29				$ 4.05	$ 5.21
Gain (Loss) on Disposition of Property Plant Equipment				$ 1,372,409
Repayments of Long-term Debt		75,268,462us-gaap_RepaymentsOfLongTermDebt	37,696,190us-gaap_RepaymentsOfLongTermDebt	48,965,869us-gaap_RepaymentsOfLongTermDebt
Proceeds from Issuance of Debt		81,950,000us-gaap_ProceedsFromIssuanceOfDebt
Subsequent Event [Member] \| LPG Vessels [Member] \| Three of Three Tranches [Member] \| First Facility Agreement with a Bank [Member]
Note 19 - Subsequent Events (Details) [Line Items]
Proceeds from Issuance of Debt							15,750,000
Subsequent Event [Member] \| Eco Lucidity Vessel [Member]
Note 19 - Subsequent Events (Details) [Line Items]
Payment Installment for Vessel Delivery								6,732,334
Subsequent Event [Member] \| The Gas Kaizen and the Gas Crystal Vessels [Member]
Note 19 - Subsequent Events (Details) [Line Items]
Property, Plant, and Equipment, Salvage Value									2,117,684
Gain (Loss) on Disposition of Property Plant Equipment									34,751
Subsequent Event [Member] \| Eco Enigma Vessel [Member]
Note 19 - Subsequent Events (Details) [Line Items]
Payment Installment for Vessel Delivery										14,625,000
Subsequent Event [Member] \| Term Loan 2 [Member]
Note 19 - Subsequent Events (Details) [Line Items]
Repayments of Long-term Debt											13,500,000
Subsequent Event [Member]
Note 19 - Subsequent Events (Details) [Line Items]
Additional Amount of Stock Repurchase Program Authorized Amount													$ 20,000,000
Treasury Stock, Shares, Acquired (in Shares)												926,074
Treasury Stock Acquired, Average Cost Per Share (in Dollars per share)												$ 6.08