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Earnings per share - Summary of earnings per share (Detail) - AUD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2022
Earnings per share [abstract] |  |  |
Loss after income tax attributable to the owners of Kazia Therapeutics Limited | $ (26,778) | $ (20,465) | $ (25,014)
Loss after income tax attributable to the owners of Kazia Therapeutics Limited | $ (26,778) | $ (20,465) | $ (25,014)
Weighted average number of ordinary shares used in calculating basic and diluted earnings per share | 263,676,313 | 184,284,350 | 132,467,686
Basic earnings per share | $ (0.1016) | $ (0.1123) | $ (0.1888)
Diluted earnings per share | $ (0.1016) | $ (0.1123) | $ (0.1888)

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