Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Number of shares issued during the period to an employee benefit plan, such as a defined contribution or defined benefit plan.

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Long-Term Incentive Awards (Details) - USD ($)	3 Months Ended				12 Months Ended
Long-Term Incentive Awards (Details) - USD ($)	Aug. 01, 2020	Jul. 27, 2019	Jul. 28, 2018	Jul. 29, 2017	Apr. 30, 2020
Stock Based Compensation
Stock based compensation expense	$ 0				$ 0
Fiscal 2021 LTIP \| Performance based restricted stock units
Stock Based Compensation
Stock based compensation expense	$ 91,000
Exercisable period from grant date	3 years
Fiscal 2021 LTIP \| Performance based restricted stock units \| 100% Vested
Stock Based Compensation
Vesting (as a percentage)	100.00%
Fiscal 2021 LTIP \| Performance based restricted stock units \| 50% Vested
Stock Based Compensation
Vesting (as a percentage)	50.00%
Fiscal 2021 LTIP \| Performance based restricted stock units \| 250% Vested
Stock Based Compensation
Vesting (as a percentage)	250.00%
Fiscal 2021 LTIP \| Performance based restricted stock units \| Maximum
Stock Based Compensation
Stock based compensation expense	$ 7,946,000
Fiscal 2020 LTIP \| Performance based restricted stock units
Stock Based Compensation
Stock based compensation expense	80,000	$ 131,000
Exercisable period from grant date		3 years
Fiscal 2020 LTIP \| Performance based restricted stock units \| 100% Vested
Stock Based Compensation
Vesting (as a percentage)		100.00%
Fiscal 2020 LTIP \| Performance based restricted stock units \| 50% Vested
Stock Based Compensation
Vesting (as a percentage)		50.00%
Fiscal 2020 LTIP \| Performance based restricted stock units \| 200% Vested
Stock Based Compensation
Vesting (as a percentage)		200.00%
Fiscal 2020 LTIP \| Performance based restricted stock units \| Maximum
Stock Based Compensation
Stock based compensation expense	4,263,000
Fiscal 2019 LTIP \| Performance based restricted stock units
Stock Based Compensation
Stock based compensation expense	75,000		$ 33,000
Exercisable period from grant date			3 years
Fiscal 2019 LTIP \| Performance based restricted stock units \| 100% Vested
Stock Based Compensation
Vesting (as a percentage)			100.00%
Fiscal 2019 LTIP \| Performance based restricted stock units \| 50% Vested
Stock Based Compensation
Vesting (as a percentage)			50.00%
Fiscal 2019 LTIP \| Performance based restricted stock units \| 200% Vested
Stock Based Compensation
Vesting (as a percentage)			200.00%
Fiscal 2019 LTIP \| Performance based restricted stock units \| Maximum
Stock Based Compensation
Stock based compensation expense	2,478,000
Fiscal 2018 LTIP \| Performance based restricted stock units
Stock Based Compensation
Stock based compensation expense	$ 0	$ 8,000
Exercisable period from grant date				3 years
Issue of fully-vested shares of common stock to settle	16,228
Fiscal 2021 LTIP, Fiscal 2020 LTIP and Fiscal 2019 LTIP
Stock Based Compensation
Stock based compensation expense	$ 1,853,000				$ 1,607,000