Net Income (Loss) Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Basic weighted average number of common shares outstanding (in shares)	18,426,408	18,191,446
Dilutive securities (in shares)	91,509	0
Total shares including dilutive securities (in shares)	18,517,917	18,191,446
Net income (loss) from continuing operations	$ 1,084	$ (359)
Loss from discontinued operations, net of income tax	0	(47)
Net income (loss)	$ 1,084	$ (406)
Basic income (loss) per common share:
Basic net income (loss) per common share from continuing operations (in usd per share)	$ 0.06	$ (0.02)
Basic loss per common share from discontinued operations (in usd per share)	0	0
Basic net income (loss) per common share (in usd per share)	0.06	(0.02)
Diluted income (loss) per common share:
Diluted net income (loss) per common share from continuing operations (in usd per share)	0.06	(0.02)
Diluted loss per common share from discontinued operations (in usd per share)	0	0
Diluted net income (loss) per common share (in usd per share)	$ 0.06	$ (0.02)
Antidilutive securities excluded from computation of earnings per share, amount (in shares)		0

Incremental Common Shares Attributable To Dilutive Effect Of Restricted Stock

No definition available.

Name:	slng_IncrementalCommonSharesAttributableToDilutiveEffectOfRestrictedStock
Namespace Prefix:	slng_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.