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REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Customer Deposits (Details) - USD ($)
3 Months Ended 6 Months Ended
Nov. 30, 2022
Nov. 30, 2021
Nov. 30, 2022
Nov. 30, 2021
Customer Deposits [Roll Forward]        
Balance, beginning of period $ 14,111,000 $ 0 $ 9,524,000 $ 0
Customer deposits received 10,713,000 0 15,300,000 0
Customer deposits refunded 0 0 0 0
Other adjustments (135,000) 0 (135,000) 0
Balance, ending of period $ 24,689,000 $ 0 $ 24,689,000 $ 0