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Earnings Per Share - Summary of Earnings Per Share (Detail) - AUD ($)
12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Earnings per share [line items]      
Loss after income tax attributable to the owners of Immutep Limited $ (42,716,625) $ (39,896,348) $ (32,210,826)
Weighted average number of ordinary shares used in calculating basic earnings per share (EPS) 1,201,061,930 892,399,810 848,968,068
Weighted average number of ordinary shares used in calculating diluted earnings per share (EPS) 1,201,061,930 892,399,810 848,968,068
Basic earnings per share $ (0.0356) $ (0.0447) $ (0.0379)
Diluted earnings per share $ (0.0356) $ (0.0447) $ (0.0379)