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Accounting for Uncertainty in Income Taxes (Tables)
 12 Months Ended
Apr. 30, 2019
Income Tax Disclosure [Abstract]  
Activity Related to Unrecognized Tax Benefits
The following table summarizes the activity related to unrecognized tax benefits, excluding the federal tax benefit of state tax deductions:
 
APRIL 30
(in thousands)
2019

2018
 Change in Unrecognized Tax Benefits
 

 
 Balance at beginning of year
$
928


$
28

 Additions based on tax positions related to the current year
120


—

 Additions for tax positions of prior years
1,192


—

 Acquisitions, divestures, and other
—


900

 Balance at end of year
$
2,240


$
928