NET INCOME PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Net income per common share:
Net income	$ 11,372	$ 35,330
Denominator for basic net income per share (weighted-average shares which reflect 509,242 shares in the treasury at January 31, 2021 and 2020)	7,900,131	7,977,683
Effect of dilutive securities from restricted stock plan and from dilutive effect of stock options	153,745	163,506
Denominator for diluted net income per share (adjusted weighted average shares)	8,053,876	8,141,189
Basic net income per share	$ 1.44	$ 4.43
Diluted net income per share	$ 1.41	$ 4.34