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Current liabilities - provisions - Summary of current liabilities - provisions (Detail) - AUD ($) $ in Thousands | Jun. 30, 2018 | Jun. 30, 2017
--- | --- | ---
Disclosure of provisions [line items] |  |
Current liabilities - provisions | $ 161 | $ 155
Employee benefits [member] |  |
Disclosure of provisions [line items] |  |
Current liabilities - provisions | 91 | $ 155
Lease make good [member] |  |
Disclosure of provisions [line items] |  |
Current liabilities - provisions | $ 70 |

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- Definition The amount of current provisions. [Refer: Provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 54 -Subparagraph l -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_54_l&doctype=Standard -URIDate 2017-03-09 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Disclosure of provisions line items. + 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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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfLiabilitiesAxis=kzia_LeaseMakeGoodMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |