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Note 5 - Advances for Vessels Under Construction and Acquisitions (Details Textual)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Advances for Vessels Under Construction and Acquisitions	$ 55,785,801	$ 44,031,882	$ 88,965,085
LPG Carriers Contracted in 2014 from Ship-builders [Member]
Number of Vessels Under Construction	4	6

X

- Definition

Advance payments to ship-builders for vessels under construction or payments to sellers for new vessels.

+ References

No definition available.

+ Details

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Namespace Prefix:	gass_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Represents the number of vessels under construction.

+ References

No definition available.

+ Details

Name:	gass_NumberOfVesselsUnderConstruction
Namespace Prefix:	gass_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=gass_LPGCarriersContractedIn2014FromShipBuildersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: