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Financial instruments - Summary of foreign currency risk sensitivity (Detail) - Foreign currency risk [member] - AUD ($) $ in Thousands | Jun. 30, 2022 | Jun. 30, 2021
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US dollars [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
% change | 10.00% | 10.00%
Increase in market risk [member] | US dollars [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
% change | 10.00% | 10.00%
Increase in market risk [member] | Euros [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
% change | 10.00% | 10.00%
Effect of increase in market risk on profit (loss) before tax [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Effect on profit before tax/equity | $ (400) | $ (1,761)
Effect of increase in market risk on profit (loss) before tax [member] | US dollars [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Effect on profit before tax/equity | (420) | (1,762)
Effect of increase in market risk on profit (loss) before tax [member] | Euros [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Effect on profit before tax/equity | 20 | 1
Effect of increase in market risk on equity [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Effect on profit before tax/equity | (400) | (1,761)
Effect of increase in market risk on equity [member] | US dollars [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Effect on profit before tax/equity | (420) | (1,762)
Effect of increase in market risk on equity [member] | Euros [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Effect on profit before tax/equity | $ 20 | $ 1
Decrease in market risk [member] | US dollars [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
% change | (10.00%) | (10.00%)
Decrease in market risk [member] | Euros [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
% change | (10.00%) | (10.00%)
Effect of decrease in market risk on profit (loss) before tax [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Effect on profit before tax/equity | $ 400 | $ 1,761
Effect of decrease in market risk on profit (loss) before tax [member] | US dollars [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Effect on profit before tax/equity | 420 | 1,762
Effect of decrease in market risk on profit (loss) before tax [member] | Euros [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Effect on profit before tax/equity | (20) | (1)
Effect of decrease in market risk on equity [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Effect on profit before tax/equity | 400 | 1,761
Effect of decrease in market risk on equity [member] | US dollars [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Effect on profit before tax/equity | 420 | 1,762
Effect of decrease in market risk on equity [member] | Euros [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Effect on profit before tax/equity | $ (20) | $ (1)

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