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Net Earnings Per Share (Tables)
 3 Months Ended
Jul. 31, 2021
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted The following table sets forth the computation of basic and diluted net earnings per share:
 Three Months Ended
 July 31,
(in thousands, except per share amounts)20212020
As Adjusted
Numerator used in basic and diluted net earnings  
per common share:  
Net income$2,981 $16,059 
Denominator:  
Denominator for basic net earnings per common  
share - weighted-average shares16,661 16,937 
Effect of dilutive securities:  
Stock options and restricted stock units55 77 
Denominator for diluted net earnings per common  
share - weighted-average shares and assumed  
conversions16,716 17,013 
Net earnings per share  
Basic$0.18 $0.95 
Diluted$0.18 $0.94