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PROPERTY AND EQUIPMENT AND DEPOSITS ON EQUIPMENT - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Feb. 28, 2023
Feb. 28, 2022
Feb. 28, 2023
Feb. 28, 2022
Property, Plant and Equipment [Abstract]        
Depreciation and amortization $ 0.9 $ 0.2 $ 2.6 $ 0.2