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 ($)	3 Months Ended						9 Months Ended		12 Months Ended
Long-Term Incentive Awards (Details) - USD ($)	Jan. 30, 2021	Aug. 01, 2020	Jan. 25, 2020	Jul. 27, 2019	Jul. 28, 2018	Jul. 30, 2017	Jan. 30, 2021	Jan. 25, 2020	Apr. 30, 2020
Fiscal 2021 LTIP \| Performance based restricted stock units
Stock Based Compensation
Stock based compensation expense	$ 126,000		$ 0				$ 564,000	$ 0
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	26,000							319,000
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	27,000		246,000				291,000	294,000
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		$ 201,000					$ 162,000
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							$ 2,780,000		$ 1,607,000