EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Aug. 31, 2022	Aug. 31, 2021
EARNINGS PER SHARE
Net income	$ 589	$ 696
Weighted average shares outstanding	27,242	23,999
Shares used in basic net income per share calculation	27,242	23,999
Effect of dilutive securities	1,546	1,357
Denominator for diluted net income per share	28,788	25,356
Basic net income per share	$ 0.02	$ 0.03
Diluted net income per share	$ 0.02	$ 0.03