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v3.20.1

Subsequent Events Subsequent Events (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2019
Subsequent Events [Abstract] |  |  |
Net equity income from foreign joint ventures' operations | $ 174 | $ 1,100 | $ 0

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- Definition Foreign Joint Venture, Equity Income, Net + References No definition available. + Details
Name: | slng_ForeignJointVentureEquityIncomeNet
Namespace Prefix: | slng_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_SubsequentEventsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration