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Common Stock and Stock-Based Compensation - Stock Based Compensation Expenses (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 25, 2020 | Dec. 27, 2019 | Dec. 25, 2020 | Dec. 27, 2019 | Mar. 27, 2020 | Mar. 29, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock-based compensation | $ 45,876 | $ 303 | $ 46,901 | $ 1,051 | $ 1,435 | $ 1,441
Cost of Sales [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock-based compensation | 4,694 | 47 | 4,844 | 137 | 183 | 181
Research and Development Expense [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock-based compensation | 2,984 | 20 | 3,037 | 65 | 87 | 74
Selling, General and Administrative |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock-based compensation | $ 38,198 | $ 236 | $ 39,020 | $ 849 | $ 1,165 | $ 1,186

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