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Note 10 - Shareholders' Equity and Share-Based Compensation (Tables) | 12 Months Ended
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May 01, 2021
Notes Tables |
Schedule of Nonvested Restricted Stock and Restricted Stock Units Activity [Table Text Block] |
|  | Year Ended |
|  | May 1, 2021 |  |  | May 2, 2020 |  |  | April 27, 2019 |
|  | Number of Nonvested Shares |  |  | Weighted Average Grant Date Fair Value Per Share |  |  | Number of Nonvested Shares |  |  | Weighted Average Grant Date Fair Value Per Share |  |  | Number of Nonvested Shares |  |  | Weighted Average Grant Date Fair Value Per Share |
Outstanding at beginning of year |  |  | 449 |  |  | $ | 7.16 |  |  |  | 444 |  |  | $ | 7.58 |  |  |  | 437 |  |  | $ | 8.48 |
Granted |  |  | 223 |  |  |  | 3.92 |  |  |  | 186 |  |  |  | 7.03 |  |  |  | 181 |  |  |  | 6.79 |
Vested |  |  | (176 | ) |  |  | 7.27 |  |  |  | (173 | ) |  |  | 8.10 |  |  |  | (169 | ) |  |  | 9.05 |
Forfeited |  |  | (16 | ) |  |  | 7.00 |  |  |  | (8 | ) |  |  | 7.37 |  |  |  | (5 | ) |  |  | 7.74 |
Outstanding at end of year |  |  | 480 |  |  | $ | 5.62 |  |  |  | 449 |  |  | $ | 7.16 |  |  |  | 444 |  |  | $ | 7.58 |
Share-based Payment Arrangement, Option, Activity [Table Text Block] |
|  | Stock Options |  |  | Weighted Average Exercise Price Per Share |  |  | Weighted Average Remaining Contractual Life (Years) |  |  | Aggregate Intrinsic Value |
Outstanding at May 2, 2020 |  |  | 2,121 |  |  | $ | 9.96 |  |  |  | 4.38 |  |  | $ | — |
Granted |  |  | 412 |  |  |  | 4.11 |  |  |  | — |  |  |  | — |
Canceled or forfeited |  |  | (306 | ) |  |  | 12.48 |  |  |  | — |  |  |  | — |
Outstanding at May 1, 2021 |  |  | 2,227 |  |  | $ | 8.53 |  |  |  | 4.83 |  |  | $ | 843.00 |
Shares vested and expected to vest |  |  | 2,190 |  |  | $ | 8.58 |  |  |  | 4.76 |  |  | $ | 792.00 |
Exercisable at May 1, 2021 |  |  | 1,478 |  |  | $ | 9.83 |  |  |  | 3.00 |  |  | $ | — |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | Year Ended |
|  | May 1, 2021 |  |  | May 2, 2020 |  |  | April 27, 2019 |
Fair value of options granted |  | $ | 1.71 |  |  | $ | 1.99 |  |  | $ | 2.16 |
Risk-free interest rate |  |  | 43.00 | % |  |  | 1.51 | % |  |  | 2.83 | %
Expected dividend rate |  |  | — | % |  |  | 3.50 | % |  |  | 3.37 | %
Expected volatility |  |  | 40.53 | % |  |  | 37.55 | % |  |  | 38.58 | %
Expected life of option (in years) |  |  | 6.94 |  |  |  | 6.94 |  |  |  | 6.83 |
Share-based Payment Arrangement, Cost by Plan [Table Text Block] |
|  | Year Ended |
|  | May 1, 2021 |  |  | May 2, 2020 |  |  | April 27, 2019 |
Stock options |  | $ | 450 |  |  | $ | 492 |  |  | $ | 593 |
Restricted stock and stock units |  |  | 1,203 |  |  |  | 1,341 |  |  |  | 1,446 |
Employee stock purchase plans |  |  | 414 |  |  |  | 432 |  |  |  | 440 |
|  | $ | 2,067 |  |  | $ | 2,265 |  |  | $ | 2,479 |
|  | Year Ended |
|  | May 1, 2021 |  |  | May 2, 2020 |  |  | April 27, 2019 |
Cost of sales |  | $ | 472 |  |  | $ | 514 |  |  | $ | 578 |
Selling |  |  | 484 |  |  |  | 572 |  |  |  | 625 |
General and administrative |  |  | 678 |  |  |  | 717 |  |  |  | 772 |
Product design and development |  |  | 433 |  |  |  | 462 |  |  |  | 504 |
|  | $ | 2,067 |  |  | $ | 2,265 |  |  | $ | 2,479 |

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