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v3.23.4

Income Taxes - Additional Information (Details) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2023 | Dec. 31, 2022
Earliest Tax Year [Member] |  |
Income Tax [Line Items] |  |
Non-Capital Losses Expiration Year | 2032 | 2032
Latest Tax Year [Member] |  |
Income Tax [Line Items] |  |
Non-Capital Losses Expiration Year | 2042 | 2042

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- Definition Line items represent income taxes. + References No definition available. + Details
Name: | stsff_IncomeTaxLineItems
Namespace Prefix: | stsff_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Non-capital losses expiration year. + References No definition available. + Details
Name: | stsff_NonCapitalLossesExpirationYear
Namespace Prefix: | stsff_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_TaxPeriodAxis=us-gaap_EarliestTaxYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_TaxPeriodAxis=us-gaap_LatestTaxYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |