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Earnings per share - Summary of earnings per share (Detail) - AUD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Earnings per share [abstract]
Loss after income tax attributable to the owners of Kazia Therapeutics Limited	$ (20,702)	$ (26,778)	$ (20,465)
Loss after income tax attributable to the owners of Kazia Therapeutics Limited	$ (20,702)	$ (26,778)	$ (20,465)
Weighted average number of ordinary shares used in calculating basic and diluted earnings per share	547,941,171	263,676,313	184,284,350
Basic earnings per share	$ (0.0378)	$ (0.1016)	$ (0.1123)
Diluted earnings per share	$ (0.0378)	$ (0.1016)	$ (0.1123)

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- Definition

The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator).

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The total of income less expenses from continuing and discontinued operations, excluding the components of other comprehensive income. [Refer: Other comprehensive income]

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