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Stock-based Compensation and Stockholders’ Equity - Summary of Stock-based Compensation by Income Statement Line Item (Details) - USD ($) $ in Thousands | 12 Months Ended
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May 29, 2022 | May 30, 2021 | May 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total stock-based compensation | $ 2,608 | $ 3,360 | $ 2,419
Discontinued Operations |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total stock-based compensation | (34) | 55 | 44
Cost of sales | Continuing Operations |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total stock-based compensation | 314 | 348 | 118
Research and development | Continuing Operations |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total stock-based compensation | 202 | 223 | 158
Selling, general and administrative | Continuing Operations |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total stock-based compensation | $ 2,126 | $ 2,734 | $ 2,099

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