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Operating segments - Additional Information (Detail) | 12 Months Ended
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Jun. 30, 2018 Major_Customer Segments | Jun. 30, 2017 Major_Customer
Disclosure of operating segments [abstract] |  |
Number of operating segments | Segments | 0 |
Number of major customers | Major_Customer | 0 | 0

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

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- Definition Number of major customers. + References No definition available. + Details
Name: | kzia_NumberOfMajorCustomers
Namespace Prefix: | kzia_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of operating segments. + References No definition available. + Details
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Namespace Prefix: | kzia_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration