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Revenue Recognition - Additional Information (Details)	9 Months Ended
	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Period of recognition, performance obligations	30 days
Period of recognition upon receipt of invoice	30 days
LNG
Disaggregation of Revenue [Line Items]
Period of collection on accounts receivable, net	30 days
Power Delivery
Disaggregation of Revenue [Line Items]
Period of collection on accounts receivable, net	12 months
Product Contracts
Disaggregation of Revenue [Line Items]
Payment terms	30 days
Rental Contracts
Disaggregation of Revenue [Line Items]
Payment terms	30 days
Service Contracts
Disaggregation of Revenue [Line Items]
Payment terms	30 days

X

- Definition

Accounts Receivable, Net of Allowance, Period of Collection

+ References

No definition available.

+ Details

Name:	slng_AccountsReceivableNetofAllowancePeriodofCollection
Namespace Prefix:	slng_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Revenue, Payment Terms

+ References

No definition available.

+ Details

Name:	slng_RevenuePaymentTerms
Namespace Prefix:	slng_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Revenue, Performance Obligation, Period of Recognition

+ References

No definition available.

+ Details

Name:	slng_RevenuePerformanceObligationPeriodofRecognition
Namespace Prefix:	slng_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Revenue, Receipt of Invoice, Period of Recognition

+ References

No definition available.

+ Details

Name:	slng_RevenueReceiptofInvoicePeriodofRecognition
Namespace Prefix:	slng_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=slng_LNGSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=slng_PowerDeliverySegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=slng_ProductContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=slng_RentalContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=slng_ServiceContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: