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Financial instruments - Summary of foreign currency risk sensitivity (Detail) - Foreign currency risk [member] - AUD ($) $ in Thousands | Jun. 30, 2025 | Jun. 30, 2024
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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%
Increase in market risk [member] | GBP [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 | $ (840) | $ (1,143)
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 | (165) | (409)
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 | (674) | (732)
Effect of increase in market risk on profit (loss) before tax [member] | GBP [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Effect on profit before tax/equity | (1) | (2)
Effect of increase in market risk on equity [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Effect on profit before tax/equity | (840) | (1,143)
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 | (165) | (409)
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 | (674) | (732)
Effect of increase in market risk on equity [member] | GBP [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Effect on profit before tax/equity | $ (1) | $ (2)
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%)
Decrease in market risk [member] | GBP [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 | $ 840 | $ 1,143
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 | 165 | 409
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 | 674 | 732
Effect of decrease in market risk on profit (loss) before tax [member] | GBP [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Effect on profit before tax/equity | 1 | 2
Effect of decrease in market risk on equity [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Effect on profit before tax/equity | 840 | 1,143
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 | 165 | 409
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 | 674 | 732
Effect of decrease in market risk on equity [member] | GBP [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Effect on profit before tax/equity | $ 1 | $ 2

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