Income tax - Summary of Unrecognized Deferred Tax Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Jun. 30, 2025
Capital losses carried forward \| Canadian
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unrecognized deferred tax assets, gross amount	$ 41	$ 41
Unrecognized deferred tax assets, tax effect	10	10
Capital losses carried forward \| USA
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unrecognized deferred tax assets, gross amount	12,885	12,885
Unrecognized deferred tax assets, tax effect	3,234	3,271
Non-capital losses \| Canadian
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unrecognized deferred tax assets, gross amount	48	48
Unrecognized deferred tax assets, tax effect	12	12
Net operating loss \| Australia
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unrecognized deferred tax assets, gross amount	3,364	2,811
Unrecognized deferred tax assets, tax effect	$ 1,009	$ 843