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REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Customer Deposits (Details) - USD ($)	3 Months Ended		9 Months Ended
	Feb. 28, 2023	Feb. 28, 2022	Feb. 28, 2023	Feb. 28, 2022
Customer Deposits [Roll Forward]
Balance, beginning of period	$ 24,689,000	$ 0	$ 9,524,000	$ 0
Customer deposits received	11,681,000	5,645,000	26,980,000	5,645,000
Customer deposits refunded	0	0	0	0
Other adjustments	0	0	(135,000)	0
Balance, ending of period	$ 36,370,000	$ 5,645,000	$ 36,370,000	$ 5,645,000