Net Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Apr. 30, 2024	Apr. 30, 2023
Net income per common share:
Net income	$ 1,653	$ 1,320
Denominator for basic net income per share	7,364,757	7,325,005
Effect of dilutive securities from restricted stock plan and from dilutive effect of stock options	217,692	177,858
Denominator for diluted net income per share (adjusted weighted average shares)	7,582,449	7,502,863
Basic net income per share	$ 0.22	$ 0.18
Diluted net income per share	$ 0.22	$ 0.18