Financial instruments - Summary of Interest Income and Interest Expense for Financial Assets or Financial Liabilities that are Not at Fair Value Through Profit or Loss (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Disclosure of detailed information about financial instruments [abstract] | ||
| Interest income | $ (365,000) | $ (242,000) |
| Interest expense | 2,164,000 | 3,953,000 |
| Accretion expense | 225,000 | 301,000 |
| Interest expense (net) | $ 2,024,000 | $ 4,012,000 |