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Share Capital - Long-term Incentive Plan (Details) | Mar. 31, 2025
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Long-term Incentive Plan |
Share Capital |
Aggregate number of common shares to be issued, as a percent of outstanding common shares at any time when combined with the aggregate number of Option, RSU, PSU and DSU | 10.00%

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- Definition The maximum shares to be issued in a share-based compensation arrangement, as percentage outstanding shares when combined with the aggregate number of options, restricted stock units (RSU), performance share units (PSU) and deferred share units (DSU). + References No definition available. + Details
Name: | ck0001537137_ShareBasedCompensationMaximumSharesToBeIssued
Namespace Prefix: | ck0001537137_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ck0001537137_IfrsPlanNameAxis=ck0001537137_EquityIncentivePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |