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Income Taxes - Deferred Tax Liabilities and Assets (Detail) - USD ($)
$ in Thousands
Jun. 30, 2025
Jun. 30, 2024
Components of Deferred Tax Assets [Abstract]    
Tax losses carried forward $ 53,346 $ 45,721
Capitalization of R&D costs 9,398 11,456
Fixed and intangible assets 7,881 8,058
Share-based payments 2,375 4,081
Right-of-use assets 0 (45)
Other 700 647
Total deferred tax assets 73,700 69,918
Valuation allowance for deferred tax assets (73,700) (69,918)
Net deferred tax assets and liabilities $ 0 $ 0