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Reconciliation of Weighted Average Shares Outstanding (Tables)
 12 Months Ended
Apr. 30, 2020
Reconciliation of Weighted Average Shares Outstanding [Abstract]  
Reconciliation of Shares used in Computation of Earnings Per Share
A reconciliation of the shares used in the computation of earnings per share for the years ended April 30 follows:

  
2020
    
2019
    
2018
  
Weighted average shares outstanding
    
56,224
      
57,240
      
57,181
  
Less: Unvested restricted shares
    
(15
)
    
(48
)
    
(138
)
Shares used for basic (loss) earnings per share
    
56,209
      
57,192
      
57,043
  
Dilutive effect of stock options and other stock awards
    
—
      
648
      
845
  
Shares used for diluted (loss) earnings per share
    
56,209
      
57,840
      
57,888