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Financial instruments - Summary of foreign currency risk sensitivity (Detail) - Foreign currency risk [member] - AUD ($) $ in Thousands | Jun. 30, 2021 | Jun. 30, 2020
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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% |
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 | $ (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 | (1,762) | $ 192
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 | 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 | (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 | (1,762) | $ 192
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 | $ 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%) |
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 | $ 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 | 1,762 | $ (192)
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 | (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 | 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 | 1,762 | $ (192)
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 | $ (1) |

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- Definition The amount of risk exposure associated with financial instruments with a shared characteristic that identifies a concentration of risks. [Refer: Financial instruments, class [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph B8 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_B8_c&doctype=Appendix&subtype=B -URIDate 2020-01-01 + Details
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