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Stock-based Compensation and Stockholders' Equity (Tables) | 9 Months Ended
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Feb. 23, 2020
Share-based Payment Arrangement [Abstract] |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs | The following table summarizes stock-based compensation by income statement line item:
| Three Months Ended |  |  |  | Nine Months Ended |  |
(In thousands) | February 23, 2020 |  | February 24, 2019 |  | February 23, 2020 |  | February 24, 2019
Cost of sales | $ | (14) |  |  | $ | 116 |  |  | $ | 42 |  |  | $ | 334 |
Research and development | 10 |  |  | 29 |  |  | 88 |  |  | 84 |
Selling, general and administrative | 570 |  |  | 671 |  |  | 1,751 |  |  | 2,064 |
Total stock-based compensation | $ | 566 |  |  | $ | 816 |  |  | $ | 1,881 |  |  | $ | 2,482 |

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