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Restructuring Charges Restructuring Charges (Tables)
 3 Months Ended
Jul. 31, 2018
Restructuring and Related Activities [Abstract]  
Restructuring Charges Reserve
A reserve for restructuring charges of $2.3 million is included in accrued compensation and related expenses in the consolidated balance sheets.
Restructuring reserve balance as of May 1, 2018
$
—
Expense
 
2,441
Payments
 
(182)
Restructuring reserve balance as of July 31, 2018
$
2,259