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v3.23.1

Pilot plant - Carrying Value Summary (Details) - CAD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2023 | Mar. 31, 2022 | Jun. 30, 2022
Pilot plant |  |  |  |  |
Balance |  |  | $ 985,057 | $ 12,338,741 | $ 12,338,741
Additions |  |  |  |  | 1,929,020
Amortisation | $ (1,096) | $ (3,906,410) | (206,732) | $ (11,249,269) | (13,355,544)
Effect of movement in foreign exchange rates |  |  | 34,393 |  | 72,840
Balance | $ 812,718 |  | $ 812,718 |  | $ 985,057

X
- References No definition available. + Details
Name: | sli_AmortisationOfPilotPlant
Namespace Prefix: | sli_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | sli_DisclosurePilotPlantAbstract
Namespace Prefix: | sli_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of additions to pilot plant. + References No definition available. + Details
Name: | sli_PilotPlantAdditions
Namespace Prefix: | sli_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The foreign exchange rates effect of pilot plant. + References No definition available. + Details
Name: | sli_PilotPlantForeignExchangeRatesEffect
Namespace Prefix: | sli_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | sli_PilotPlantNoncurrent
Namespace Prefix: | sli_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant