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Long-Term Incentive Awards (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 31, 2020 | Aug. 01, 2020 | Oct. 26, 2019 | Jul. 27, 2019 | Jul. 30, 2017 | Oct. 31, 2020 | Oct. 26, 2019 | Oct. 27, 2018 | Apr. 30, 2020
Fiscal 2021 LTIP | Performance based restricted stock units |  |  |  |  |  |  |  |  |
Stock Based Compensation |  |  |  |  |  |  |  |  |
Stock based compensation expense | $ 347,000 |  | $ 0 |  |  | $ 438,000 | $ 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 | 264,000 |  |  |  |  |  | 345,000 |  |
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 | 189,000 |  | 16,000 |  |  |  | 48,000 | $ 264,000 |
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 |  | $ 46,000 |  |  |  | $ 39,000 |  |
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 |  |  |  |  |  | $ 2,653,000 |  |  | $ 1,607,000

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