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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

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- References

No definition available.

+ Details

Name:	sli_DisclosureReclamationDepositAbstract
Namespace Prefix:	sli_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

Name:	sli_ReclamationDepositNoncurrent
Namespace Prefix:	sli_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant