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Share-Based Payments - Summary of Options Granted (Detail) | 12 Months Ended
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Jun. 30, 2025 shares $ / shares | Jun. 30, 2024 shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Granted during the fiscal year Number | 0 | 0
Ridgeback Capital Investments and Trout Group LLC. [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Balance at start of the fiscal year | 847,600 |
Granted during the fiscal year Number | 0 |
Exercised during the fiscal year Number | 0 |
Forfeited during the fiscal year Number | 0 |
Balance at end of the fiscal year | 847,600 | 847,600
Vested and exercisable at end of the fiscal year Number | 0 |
July 31,2015 [member] | Ridgeback Capital Investments and Trout Group LLC. [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Expiry date | August 5, 2025 |
Exercise price | $ / shares | $ 0.248 |
Balance at start of the fiscal year | 847,600 |
Granted during the fiscal year Number | 0 |
Exercised during the fiscal year Number | 0 |
Forfeited during the fiscal year Number | 0 |
Balance at end of the fiscal year | 847,600 | 847,600
Vested and exercisable at end of the fiscal year Number | 0 |

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