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Other receivables (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Current assets [Abstract]      
Other receivables $ 1 $ 55  
Loan receivables 2,320 0  
Provincial sales tax receivable 10,023 0  
Interest receivable 75 1  
GST receivable 11,235 737  
Other receivables $ 23,654 $ 793 $ 331