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Income Taxes (Tables)
9 Months Ended
Jan. 31, 2018
Income Taxes [Abstract]  
Summary of Effective Income Tax Rate
The following table summarizes the effective tax rate for the three and nine months ended January 31, 2018 and 2017:
 
   
Three Months Ended
January 31,
  
Nine Months Ended
January 31,
 
  
2018
  
2017
  
2018
  
2017
 
Effective Tax Rate as Reported
  
(18.1
)%
  
3.2
%
  
4.0
%
  
49.5
%
Estimated net impact in fiscal 2018 of non-recurring items from Tax Act
  
42.9
%
  
-
   
17.4
%
  
-
 
Impact of unfavorable German court decision in fiscal 2017
  
-
   -   -   
(35.8
)%
Impact of reduction in U.K. statutory rate on deferred tax balances in fiscal 2017
  
-
   
-
   
-
   
4.4
%
Effective Tax Rate excluding the impact of non-recurring items from the Tax Act in fiscal 2018 and the unfavorable German court decision and UK tax rate reduction in fiscal 2017
  
24.8
%
  
3.2
%
  
21.4
%
  
18.1
%