Net Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2024	Oct. 31, 2023
Net Income Per Share
Net income	$ 86	$ 2,618	$ 363	$ 6,402
Denominator for basic net income per share (weighted-average shares which exclude shares in the treasury, 1,358,208 at October 31, 2024 and 2023)	7,428,451	7,428,557	7,379,835	7,344,559
Effect of dilutive securities from restricted stock plan	236,081	185,847	256,512	184,164
Denominator for diluted net income per share (adjusted weighted average shares)	7,664,532	7,614,404	7,636,646	7,528,723
Basic net income per share	$ 0.01	$ 0.35	$ 0.05	$ 0.87
Diluted net income per share	$ 0.01	$ 0.34	$ 0.05	$ 0.85