The number of shares issued by the entity.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 106
-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_106_d&doctype=Standard
-URIDate 2025-03-27

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of shares represented by one depositary receipt.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_112_c&doctype=Standard
-URIDate 2025-03-27

+ Details

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Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash inflow from issuing equity instruments that the entity does not separately disclose in the same statement or note.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 7
-IssueDate 2025-01-01
-Paragraph 17
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2025-en-r&anchor=para_17_a&doctype=Standard
-URIDate 2025-03-27

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from issuing shares.

+ References

+ Details

Name:	ifrs-full_ProceedsFromIssuingShares
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of aggregate offering.

+ References

No definition available.

+ Details

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

- Definition

At he market offering remaining capacity.

+ References

No definition available.

+ Details

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

- References

No definition available.

+ Details

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Namespace Prefix:	kzia_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of increase of aggregate offering price.

+ References

No definition available.

+ Details

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Namespace Prefix:	kzia_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Details

Name:	ifrs-full_ClassesOfOrdinarySharesAxis=kzia_PrivatePlacementOfEquitySecuritiesMember
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Period Type:

Contributed Equity (Details)				6 Months Ended
Contributed Equity (Details)	Dec. 02, 2025 USD ($) shares	Jul. 31, 2025 USD ($) shares	Sep. 04, 2024 USD ($)	Dec. 31, 2025 AUD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 AUD ($)	Dec. 10, 2025 shares	Jul. 25, 2025 shares	May 01, 2022
Contributed Equity [Line Items]
Ordinary shares issued	500	500						500	500
Aggregate offering					$ 35,000,000
Aggregate offering price			$ 50,000,000
Net expenses		$ 1,397,016
Market offering remaining capacity					$ 35,190,000
Number of shares issued (in Shares) \| shares	219,841,000						219,841,000	1,057,000
Proceeds from issuing shares				$ 53,735,958		$ 8,561,589
Private Placement of Equity Securities [Member]
Contributed Equity [Line Items]
Number of shares issued (in Shares) \| shares	4,530,854,000	14,204,500
Proceeds from issuing shares	$ 46,510,000	$ 1,800,000