NET INCOME PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021
NET INCOME PER SHARE
Net income	$ 4,222	$ 12,870	$ 11,707	$ 23,636
Weighted average number of shares outstanding - basic	14,134	15,769	14,516	15,748
Effects of stock awards	113	213	100	230
Weighted average number of shares outstanding - diluted	14,247	15,982	14,616	15,978
Basic	$ 0.30	$ 0.82	$ 0.81	$ 1.50
Diluted	$ 0.30	$ 0.81	$ 0.80	$ 1.48