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Shareholders' Equity - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Apr. 30, 2022 | May 01, 2021 | May 02, 2020 | Apr. 27, 2019
2014 Incentive Plan |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense | $ 11.8 | $ 6.8 | $ 0.3 |
Deferred RSU's | 121,200 |  |  |
2010 Stock Plan |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Deferred RSU's | 180,000 |  |  |
RSAs |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Shares granted in period (in shares) | 928,412 |  |  |
Additional stock issuable, shares | 464,206 |  |  |
Unrecognized stock-based compensation cost | $ 26.5 |  |  |
RSAs | Director |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Shares granted in period (in shares) | 32,505 |  |  |
Deferred share | 17,730 |  |  |
Deferred share outstanding | 17,956 |  |  |
RSAs | 2014 Incentive Plan | Management |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
RSAs vested percentage |  |  | 69.00% |
Allocated share-based compensation expense, amount recorded to true-up prior periods |  |  | $ 5.2 |
Stock-based compensation expense | $ 0.0 |  | $ (2.1) |
RSAs | 2014 Incentive Plan | Director |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Shares granted in period (in shares) |  | 33,000 | 30,000 |
Stock-based compensation expense | 0.7 | $ 0.9 | $ 0.9 |
RSUs | 2014 Incentive Plan |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Unrecognized stock-based compensation cost | $ 13.2 |  |  |
Number of restricted stock vested for which shares issued | 37,520 |  |  |
Weighted average amortization period | 9 months 18 days |  |  |
RSUs | 2014 Incentive Plan | Management |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense | $ 10.3 | $ 5.9 | $ 1.5 |
RSUs | 2004 Stock Plan |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Number of shares converted from RSAs to RSUs outstanding (in shares) | 29,945 |  |  |
Converted RSUs delivered (in shares) | 195,055 |  |  |
Share-based Payment Arrangement, Option | 2010 Plan and 2007 Plan |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Intrinsic value of options exercised | $ 0.2 |  |  |
Deferred share outstanding | 60,000 | 73,000 | 106,668 | 106,668
Converted from Restricted Stock Awards to Restricted Stock Units | 2004 Stock Plan |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Number of shares converted from RSAs to RSUs outstanding (in shares) | 225,000 |  |  |
Minimum | RSAs |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Vesting percentage | 0.00% |  |  |
Maximum | RSAs |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Vesting percentage | 100.00% |  |  |
Maximum | RSUs | 2014 Incentive Plan |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Vesting period | 5 years |  |  |

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