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Financial instruments - Additional Information (Detail) - AUD ($) | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018
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Disclosure of detailed information about financial instruments [line items] |  |  |  |
Net assets denominated in foreign currencies | $ 58,088,000 | $ 23,063,000 |  |
Net Liabilities denominated in foreign currencies | 20,237,000 | 8,938,000 |  |
Cash and cash equivalents | 27,586,760 | 8,764,044 | $ 5,434,000 | $ 5,956,000
Foreign currency risk [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Net assets denominated in foreign currencies | $ 17,608,845 |  |  |
Net Liabilities denominated in foreign currencies |  | $ 1,923,831 |  |
Foreign currency risk [member] | US dollars [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Hypothetical percentage change in risk | 10.00% | 10.00% |  |
Interest rate risk [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Hypothetical percentage change in risk | 100.00% | 100.00% |  |
Favourable/adverse effect on profit before tax and equity | $ 275,867 | $ 87,640 |  |

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