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Reclamation deposit (Details Narrative) - CAD ($) | Dec. 31, 2021 | Jun. 30, 2021 | Sep. 06, 2019
--- | --- | --- | ---
Reclamation Deposit |  |  |
[custom:ReclamationDepositNoncurrent-0] | $ 79,439 | $ 77,660 | $ 79,439

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

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