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Earnings per share - Additional Information (Detail) - shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Earnings Per Share [Line Items]
Incremental common shares attributable to unexercised options to acquire common shares	96,101	70,502	113

X

- Definition

Earnings per share .

+ References

No definition available.

+ Details

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

X

- Definition

Incremental common shares attributable to unexercised options to acquire common shares.

+ References

No definition available.

+ Details

Name:	gass_IncrementalCommonSharesAttributableToUnexercisedOptionsToAcquireCommonShares
Namespace Prefix:	gass_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration