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Pilot Plant (Details) - CAD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Pilot Plant |  |  |  |  |  |
Balance |  |  | $ 12,338,741 | $ 22,377,444 | $ 22,377,444 |
Costs transferred from asset under construction |  |  |  |  | 2,764,138 | 25,964,026
Decommissioning provision |  |  |  |  | 11,360,466 | 136,280
Amortisation | $ (3,729,731) | $ (3,290,116) | (7,342,858) | $ (4,724,990) | (1,442,375) | (3,722,862)
Decommissioning provision |  |  |  |  | (11,360,466) | (136,280)
Additions |  |  | 955,909 |  |  |
Effect of movement in foreign exchange rates |  |  | 237,863 |  |  |
Balance | $ 6,189,655 |  | $ 6,189,655 |  | $ 12,338,741 | $ 22,377,444

X
- References No definition available. + Details
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Namespace Prefix: | sli_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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X
- References No definition available. + Details
Name: | sli_DisclosurePilotPlantAbstract
Namespace Prefix: | sli_
Data Type: | xbrli:stringItemType
Balance Type: | na
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X
- Definition Amount of additions to pilot plant. + References No definition available. + Details
Name: | sli_PilotPlantAdditions
Namespace Prefix: | sli_
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Balance Type: | debit
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- Definition Amount of costs transferred from asset under construction to pilot plant. + References No definition available. + Details
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Namespace Prefix: | sli_
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- Definition Amount of decommissioning provision for pilot plant. + References No definition available. + Details
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Namespace Prefix: | sli_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition The foreign exchange rates effect of pilot plant. + References No definition available. + Details
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Namespace Prefix: | sli_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- References No definition available. + Details
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Namespace Prefix: | sli_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant