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Fair value measurement - Additional Information (Detail) | 12 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021
Disclosure of fair value measurement of assets [line items] |  |
Milestone payment discount rate | 15.00% | 15.00%
Bottom of range [member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Milestone payment discount rate | 35.00% | 35.00%
Top of range [member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Milestone payment discount rate | 55.00% | 55.00%

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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Period Type: | duration

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- Definition Milestone payment discount rate. + References No definition available. + Details
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Namespace Prefix: | kzia_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |