STOCK-BASED COMPENSATION (Details 7) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2022	Nov. 30, 2021	Nov. 30, 2022	Nov. 30, 2021
STOCKBASED COMPENSATION (Details)
Net RSUs and PRSUs vested	60,000	18,000	202,000	29,000
Shares withheld to settle payroll taxes	2,000		150,000
RSUs and PRSUs unvested	394,000	237,000	394,000	237,000
Intrinsic value of unvested RSUs and PRSUs (in thousands)	$ 10,272	$ 4,129	$ 10,272	$ 4,129