EARNINGS PER SHARE (EPS) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2021
EARNINGS PER SHARE (EPS)
Net Income (Loss)	$ 14,557	$ 9,450	$ (2,027)
Weighted average shares outstanding	27,785	26,014	23,457
Shares used in basic net income (loss) per share calculation	27,785	26,014	23,457
Effect of dilutive securities	1,430	1,760
Denominator for diluted net income (loss) per share	29,215	27,774	23,457
Basic net income (loss) per share	$ 0.52	$ 0.36	$ (0.09)
Diluted net income (loss) per share	$ 0.50	$ 0.34	$ (0.09)