NET INCOME PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2023	Nov. 30, 2022	Nov. 30, 2023	Nov. 30, 2022
Net income per share:
Net income	$ 6,089	$ 3,725	$ 10,763	$ 4,314
Denominator: Weighted average shares outstanding	28,801	27,579	28,725	27,410
Dilutive effect of common equivalent shares outstanding	968	1,501	975	1,524
Denominator: Diluted weighted average shares outstanding	29,769	29,080	29,700	28,934
Basic net income (loss) per share	$ 0.21	$ 0.14	$ 0.37	$ 0.16
Diluted net income (loss) per share	$ 0.20	$ 0.13	$ 0.36	$ 0.15
Antidilutive employee share-based award shares, excluded	9,000	14,000	4,000	14,000