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Other income - Additional Information (Detail) - 12 months ended Jun. 30, 2025 $ in Millions, $ in Millions | USD ($) | AUD ($)
--- | --- | ---
Material income and expense [abstract] |  |
Gain (loss) on disposal of intangible assets | $ 1 | $ 1.6

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- References No definition available. + Details
Name: | ifrs-full_MaterialIncomeAndExpenseAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Gain (loss) on disposal of intangible assets. + References No definition available. + Details
Name: | kzia_GainLossOnDisposalOfIntangibleAssets
Namespace Prefix: | kzia_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration