Net Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2024	Jul. 31, 2023
Net Income Per Share
Net income	$ (1,376)	$ 2,465	$ 277	$ 3,785
Denominator for basic net income (loss) per share (weighted-average shares which exclude shares in the treasury, 1,358,208 at July 31, 2024 and 2023)	7,390,873	7,409,305	7,371,358	7,340,914
Effect of dilutive securities from restricted stock plan	0	182,481	276,942	182,481
Denominator for diluted net income per share (adjusted weighted average shares)	7,390,873	7,591,786	7,648,300	7,523,395
Basic net income per share	$ (0.19)	$ 0.33	$ 0.04	$ 0.52
Diluted net income per share	$ (0.19)	$ 0.32	$ 0.04	$ 0.50