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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
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