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Contingent consideration - Summary of reconciliation of contingent consideration (Detail) - AUD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2022
Disclosure In Tabular Form Of Changes In Contingent Consideration During The Period [Line Items] |  |  |
Contingent Consideration | $ 6,871 | $ 8,968 |
Interest accretion | 339 | 594 |
Effect of exchange rates on contingent consideration | (86) | 697 |
Gain on remeasurement of contingent consideration | (119) | (3,388) | $ 0
Contingent Consideration | $ 7,005 | $ 6,871 | $ 8,968

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- Definition Contingent consideration. + References No definition available. + Details
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Namespace Prefix: | kzia_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Contingent Consideration Interest. + References No definition available. + Details
Name: | kzia_ContingentConsiderationInterest
Namespace Prefix: | kzia_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Disclosure in tabular form of changes in contingent consideration during the period. + References No definition available. + Details
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Namespace Prefix: | kzia_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Gain loss on remeasurement of contingent consideration. + References No definition available. + Details
Name: | kzia_GainLossOnRemeasurementOfContingentConsideration
Namespace Prefix: | kzia_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Impact of exchange rates on contingent consideration. + References No definition available. + Details
Name: | kzia_ImpactOfExchangeRatesOnContingentConsideration
Namespace Prefix: | kzia_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration