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Net Income Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Apr. 30, 2022
Apr. 30, 2021
Net income per common share:    
Net income $ 1,129 $ 5,002
Denominator for basic net income per share (weighted-average shares which exclude shares in the treasury, 964,722 and 509,242 at April 30, 2022 and 2021, respectively 7,615,967 7,989,215
Effect of dilutive securities from restricted stock plan and from dilutive effect of stock options 182,231 154,590
Denominator for diluted net income per share (adjusted weighted average shares) 7,798,198 8,143,805
Basic net income per share $ 0.15 $ 0.63
Diluted net income per share $ 0.14 $ 0.61