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REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Customer Deposits (Details) - USD ($)
12 Months Ended
May 31, 2023
May 31, 2022
Customer Deposits [Roll Forward]    
Balance, beginning of period $ 9,524,000 $ 0
Customer deposits received 26,981,000 9,524,000
Customer deposits refunded 0 0
Other adjustments (135,000) 0
Balance, end of period $ 36,370,000 $ 9,524,000