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Income tax benefit - Summary of Income tax benefit (Detail) - AUD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Numerical reconciliation of income tax benefit and tax at the statutory rate      
Loss before income tax benefit $ (8,906) $ (12,765) $ (10,568)
Tax at the statutory tax rate of 26% (2020 & 2019 27.5%) (2,316) (3,511) (2,906)
Tax effect amounts which are not deductible/(taxable) in calculating taxable income:      
Research and Development claim   280 394
Amortisation of intangibles 348 298  
Employee option plan 175 72 67
Gain/loss on revaluation of contingent consideration 707 131 17
Prior year tax losses not recognised now recouped (1,086) (2,730) (2,428)
Adjustment to deferred tax balances as a result of change in statutory tax rate (186)    
Tax losses and timing differences not recognised 788 2,432 2,130
Income tax benefit (484) (298) (298)
Australia [member]      
Tax losses not recognised      
Unused tax losses for which no deferred tax asset has been recognised 70,896 67,430 57,050
Potential tax benefit 18,433 17,531 15,689
US [member]      
Tax losses not recognised      
Unused tax losses for which no deferred tax asset has been recognised 2,038 1,570 2,366
Potential tax benefit $ 428 $ 330 $ 497