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Income tax benefit/expense - Summary of Income tax benefit (Detail) - AUD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Numerical reconciliation of income tax benefit and tax at the statutory rate      
Loss before income tax benefit $ (25,016) $ (8,906) $ (12,765)
Tax at the statutory tax rate of 25% (2021 26% & 2020 27.5%) (6,254) (2,316) (3,511)
Tax effect amounts which are not deductible/(taxable) in calculating taxable income:      
Research and Development claim     280
Amortisation of intangibles 488 348 298
Employee option plan 419 175 72
Gain/loss on revaluation of contingent consideration 38 707 131
Prior year tax losses not recognised now recouped (5,309) (1,086) (2,730)
Adjustment recognised for prior periods 16    
Adjustment to deferred tax balances as a result of change in statutory tax rate (113) (186)  
Tax losses and timing differences not recognised 5,038 788 2,432
Income tax benefit (368) (484) (298)
Australia [member]      
Tax losses not recognised      
Unused tax losses for which no deferred tax asset has been recognised 96,069 70,896 67,430
Potential tax benefit 24,017 17,724 17,531
US [member]      
Tax losses not recognised      
Unused tax losses for which no deferred tax asset has been recognised 2,380 2,038 1,570
Potential tax benefit $ 500 $ 428 $ 330