NET INCOME PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2022	Oct. 31, 2021
NET INCOME PER SHARE
Net income	$ 7,758	$ 12,393	$ 19,465	$ 36,029
Weighted average number of shares outstanding - basic	13,781	15,774	14,268	15,757
Effects of stock awards	31	189	82	223
Weighted average number of shares outstanding - diluted	13,812	15,963	14,350	15,980
Basic	$ 0.56	$ 0.79	$ 1.36	$ 2.29
Diluted	$ 0.56	$ 0.78	$ 1.36	$ 2.25