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Employee Benefits - Schedule of Employee Benefits (Details) - AUD ($)	Dec. 31, 2025	Jun. 30, 2025
Current liabilities
Annual leave	$ 405,833	$ 390,177
Long service leave	39,605
Employee benefits, current liabilities	445,438	390,177
Non-current liabilities
Long service leave	537	36,609
Employee benefits	$ 445,975	$ 426,786

X

- Definition

The amount of current provisions for employee benefits. [Refer: Provisions for employee benefits]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph B9
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-URIDate 2025-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2027-01-01
-Name IAS
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-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_78_d&doctype=Standard
-URIDate 2025-03-27

+ Details

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Balance Type:	credit
Period Type:	instant

X

- References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph B9
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_B9_e&doctype=Appendix&subtype=B
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2027-01-01
-Name IAS
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-IssueDate 2025-01-01
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-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_78_d&doctype=Standard
-URIDate 2025-03-27

+ Details

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X

- Definition

Annual leave benefits provision.

+ References

No definition available.

+ Details

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Namespace Prefix:	kzia_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- References

No definition available.

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X

- Definition

Long service leave current.

+ References

No definition available.

+ Details

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Namespace Prefix:	kzia_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Long service leave.

+ References

No definition available.

+ Details

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Namespace Prefix:	kzia_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- References

No definition available.

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