Share Capital - Long-term Incentive Plan (Details)	Mar. 31, 2026
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%

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).

No definition available.

Name:	ck0001537137_ShareBasedCompensationMaximumSharesToBeIssued
Namespace Prefix:	ck0001537137_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant