Net Earnings (Loss) Per Share - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
Jul. 27, 2019	Jul. 28, 2018	Dec. 14, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock Repurchase Program, Authorized Amount			$ 50,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 26,669
Shares Paid for Tax Withholding for Share Based Compensation	11,933
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	3,746,663	2,539,422
Net Income (Loss) Attributable to Parent	$ (32,155)	$ (38,622)
Net Income (Loss) Attributable to Parent, Diluted	$ (32,155)	$ (38,622)
Weighted Average Number of Shares Outstanding, Basic	47,582,000	46,917,000
Weighted Average Number of Shares Outstanding, Diluted	47,582,000	46,917,000
Earnings Per Share, Basic	$ (0.68)	$ (0.82)
Earnings Per Share, Diluted	$ (0.68)	$ (0.82)

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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