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Earnings Per Share - Summary of Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail) - shares | 12 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2023
Unlisted Options [member] |  |  |
Earnings per share [line items] |  |  |
Anti-dilutive securities excluded from computation of earnings per share | 847,600 | 847,600 | 847,600
Convertible Notes [member] |  |  |
Earnings per share [line items] |  |  |
Anti-dilutive securities excluded from computation of earnings per share | 7,432,958 | 7,261,072 | 6,646,432
Non-Executive Director Rights [member] |  |  |
Earnings per share [line items] |  |  |
Anti-dilutive securities excluded from computation of earnings per share | 1,211,112 | 2,161,392 | 1,937,065
Performance rights [member] |  |  |
Earnings per share [line items] |  |  |
Anti-dilutive securities excluded from computation of earnings per share | 16,237,064 | 13,870,535 | 12,130,033

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