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REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Customer Deposits (Details) - USD ($)
12 Months Ended
May 31, 2022
May 31, 2021
Customer Deposits [Roll Forward]    
Balance, beginning of period $ 0 $ 0
Customer deposits received 9,524,000 0
Customer deposits refunded 0 0
Balance, end of period $ 9,524,000 $ 0