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Note 5 - Advances for Vessels Under Construction and Acquisitions (Detail) (USD $)	Sep. 30, 2012	Dec. 31, 2011
	$ 19,200,000	$ 22,347,811

X

- Definition

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

+ References

No definition available.

+ Details

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