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Note 18 - Sale and Leaseback of Vessels (Details) (Gas Premiership and Gas Cathar [Member], USD $)	2 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2014
Gas Premiership and Gas Cathar [Member]
Note 18 - Sale and Leaseback of Vessels (Details) [Line Items]
Sale Leaseback Transaction, Deferred Gain, Gross	$ 780,695us-gaap_SaleLeasebackTransactionDeferredGainGross / us-gaap_SaleLeasebackTransactionDescriptionAxis = gass_GasPremiershipAndGasCatharMember	$ 780,695us-gaap_SaleLeasebackTransactionDeferredGainGross / us-gaap_SaleLeasebackTransactionDescriptionAxis = gass_GasPremiershipAndGasCatharMember
Sale Leaseback Transaction, Term of Lease	4 years
Sale Leaseback Transaction, Current Period Gain Recognized	4,954us-gaap_SaleLeasebackTransactionCurrentPeriodGainRecognized / us-gaap_SaleLeasebackTransactionDescriptionAxis = gass_GasPremiershipAndGasCatharMember
Sale Leaseback Transaction, Rent Expense		$ 325,758us-gaap_SaleLeasebackTransactionRentExpense / us-gaap_SaleLeasebackTransactionDescriptionAxis = gass_GasPremiershipAndGasCatharMember

X

- Details

Name:	gass_Note18SaleandLeasebackofVesselsDetailsLineItems
Namespace Prefix:	gass_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the term of the lease under a sale leaseback transaction.

+ References

No definition available.

+ Details

Name:	gass_SaleLeasebackTransactionTermOfLease
Namespace Prefix:	gass_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The portion of the deferred gain that was recognized in the current period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 40

-Section 35

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35688829&loc=d3e50609-112754

+ Details

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

X

- Definition

The amount of the gain recorded in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller to be recognized in future periods.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 40

-Section 25

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6456126&loc=d3e49567-112750

+ Details

Name:	us-gaap_SaleLeasebackTransactionDeferredGainGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The amount of the current period expense recorded for use of the property in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717

+ Details

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