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Earnings per Share (Tables)
 6 Months Ended
Jul. 31, 2021
Earnings Per Share [Abstract]  
Basic and Diluted Weighted Average Common Shares Used in Earnings Per Share Calculation
The following table presents the calculation of basic and diluted weighted average common shares used in the earnings per share calculation:
 Three Months Ended July 31,Six Months Ended July 31,
 2021202020212020
 (in thousands)(in thousands)
Basic weighted average common shares outstanding13,774 12,182 13,767 12,177 
Stock options79 3 58 1 
Unvested restricted stock29 10 18 5 
Total weighted average common share equivalents108 13 76 6 
Diluted weighted average common shares outstanding13,882 12,195 13,843 12,183