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Restructuring Charges Restructuring Charges (Tables)
 9 Months Ended
Jan. 31, 2019
Restructuring and Related Activities [Abstract]  
Restructuring Charges Reserve
A reserve for restructuring charges of $0.7 million is included in accrued compensation and related expenses in the consolidated balance sheets.
Restructuring reserve balance as of May 1, 2018
$
—
Expense
 
2,061
Payments
 
(1,363)
Restructuring reserve balance as of January 31, 2019
$
698