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Non-operating (expense) income - Schedule of Non-Operating (Expense) Income (Details) - USD ($)
$ in Thousands
12 Months Ended
May 31, 2022
May 31, 2021
May 31, 2020
Nonoperating Income Expense [Abstract]      
Change in fair value of convertible debenture $ 163,670 $ (170,453) $ 53,611
Change in fair value of warrant liability 63,913 1,234  
Foreign exchange (loss) gain (28,383) (22,347) 6,145
Loss on long-term investments (6,737) (2,352) (24,295)
Other non-operating (losses) gains, net 5,208 9,080 (21,266)
Non operating (expense) income $ 197,671 $ (184,838) $ 14,195