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Financial risk management - Schedule of Increase/Decrease of Share Price (Details) - USD ($) | Dec. 31, 2023 | Jun. 30, 2023 | Jun. 30, 2022
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Disclosure of Financial Risk Management [Line Items] |  |  |
Warrant liability | $ 992,000 | $ 5,426,000 | $ 2,185,000
Percentage of increase and decrease in share price | 10.00% | 10.00% |
Top of Range |  |  |
Disclosure of Financial Risk Management [Line Items] |  |  |
Ten percent of increase in share price | $ (144,000) | $ (698,000) |
Bottom of Range |  |  |
Disclosure of Financial Risk Management [Line Items] |  |  |
Ten percent of decrease in share rice | $ 140,000 | $ 686,000 |

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