Long-Term Incentive Awards (Details) - Performance based restricted stock units	6 Months Ended
Oct. 27, 2018 USD ($)
Fiscal 2019 LTIP
Stock Based Compensation
Stock based compensation expense	$ 255,000
Fiscal 2019 LTIP \| 100% Vested
Stock Based Compensation
Vesting (as a percentage)	100.00%
Fiscal 2019 LTIP \| 50% Vested
Stock Based Compensation
Vesting (as a percentage)	50.00%
Fiscal 2019 LTIP \| 200% Vested
Stock Based Compensation
Vesting (as a percentage)	200.00%
Fiscal 2019 LTIP \| Maximum
Stock Based Compensation
Stock based compensation expense	$ 3,733,000
Fiscal 2018 LTIP
Stock Based Compensation
Stock based compensation expense	$ 603,000
Exercisable period from grant date	3 years
Fiscal 2018 LTIP \| 100% Vested
Stock Based Compensation
Vesting (as a percentage)	100.00%
Fiscal 2018 LTIP \| 50% Vested
Stock Based Compensation
Vesting (as a percentage)	50.00%
Fiscal 2018 LTIP \| 200% Vested
Stock Based Compensation
Vesting (as a percentage)	200.00%
Fiscal 2018 LTIP \| Maximum
Stock Based Compensation
Stock based compensation expense	$ 2,850,000
Fiscal 2017 LTIP
Stock Based Compensation
Stock based compensation expense	$ 289,000
Exercisable period from grant date	3 years
Fiscal 2017 LTIP \| 100% Vested
Stock Based Compensation
Vesting (as a percentage)	100.00%
Fiscal 2017 LTIP \| 50% Vested
Stock Based Compensation
Vesting (as a percentage)	50.00%
Fiscal 2017 LTIP \| 200% Vested
Stock Based Compensation
Vesting (as a percentage)	200.00%
Fiscal 2017 LTIP \| Maximum
Stock Based Compensation
Stock based compensation expense	$ 2,630,000

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Percentage of vesting of share-based compensation awards.

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