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Note 12 - Derivatives and Fair Value Disclosures - Effect of Derivative Instruments on the Statements of Income (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative Instruments not Designated as Hedging Instruments, Reclassification from OCI			$ (49,471)
Foreign Currency Contract — Change in Fair Value	$ (298)	$ (138,653)	(1,348,384)
Total loss on derivatives	(766,898)	(231,931)
Interest Rate Swap [Member] | Loss on Derivatives [Member]
Derivative Instruments not Designated as Hedging Instruments, Reclassification from OCI			(49,471)
Interest Rate Swap — Loss reclassified from OCI (Effective portion)	(766,898)	(231,931)
Interest Rate Swap [Member] | Loss on Derivatives [Member] | Not Designated as Hedging Instrument [Member]
Interest Rate Swap — Change in Fair Value	297,656	1,191,050	1,652,692
Interest Rate Swap — Realized loss	(297,954)	(1,243,359)	(1,857,362)
Foreign Currency Contract — Realized loss..	297,954	1,243,359	1,857,362
Foreign Exchange Forward [Member] | Loss on Derivatives [Member] | Not Designated as Hedging Instrument [Member]
Interest Rate Swap — Realized loss		669,712	510,875
Foreign Currency Contract — Change in Fair Value		583,368	(583,368)
Foreign Currency Contract — Realized loss..		$ (669,712)	$ (510,875)

X

- Definition

Gain (loss) on derivative instruments that are designated as hedging instruments.

+ References

No definition available.

+ Details

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

X

- Definition

Represents the gains or losses transferred from accumulated other comprehensive income (loss) to the statement of income during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	gass_
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Balance Type:	debit
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X

- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5618551-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (a),(c),(d),(e)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959

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X

- Definition

The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4D
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624177-113959

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X

- Definition

Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959

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Balance Type:	credit
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X

- Definition

The difference between the book value and the sale price of options, swaps, futures, forward contracts, and other derivative instruments. This element refers to the gain (loss) included in earnings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.13(h))
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 2: 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=98514028&loc=d3e3602-108585

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X

- Details

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X

- Details

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X

- Details

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X

- Details

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