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Income Taxes (Details) - Schedule of deferred tax recovery - CAD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Schedule Of Deferred Tax Recovery Abstract |  |
Deferred tax expense (recovery) | $ 8,268 | $ 4,630
Total | $ 8,268 | $ 4,630

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Namespace Prefix: | sa_
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Period Type: | duration

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- Definition Deferred tax recovery, Total. + References No definition available. + Details
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Namespace Prefix: | sa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | sa_
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Balance Type: | na
Period Type: | duration