Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Net income (loss) per common share:
Net income	$ 2,618	$ 1,431	$ 6,402	$ 1,690
Denominator for basic net income per share (weighted-average shares which exclude shares in the treasury, 1,353,508 and 964,722 at April 30, 2023 and 2022, respectively	7,428,557,000	7,514,725,000	7,344,559,000	7,600,272,000
Effect of dilutive securities from restricted stock plan	185,847,000	189,970	184,164,000	187,390,000
Denominator for diluted net income per share (adjusted weighted average shares)	7,614,404,000	7,704,695,000	7,528,723,000	7,787,662,000
Basic net income (loss) per share	$ 0.35	$ 0.19	$ 0.87	$ 0.22
Diluted net income (loss) per share	$ 0.34	$ 0.19	$ 0.85	$ 0.22