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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

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-2 + Details
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- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary difference from in-process research and development cost acquired in business combination or from joint venture formation or both. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-6 + Details
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