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Share-Based Compensation - Allocation of Stock-based Compensation (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jan. 26, 2020 | Jan. 27, 2019 | Jan. 28, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation | $ 52,049 | $ 66,837 | $ 50,051
Net change in share-based compensation capitalized into inventory | 0 | 0 | (414)
Revenue offset (Warrant) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation | 0 | 21,501 | 16,219
Cost of sales |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation | 1,928 | 1,639 | 1,477
Selling, general and administrative expenses |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation | 38,556 | 35,430 | 24,266
Product development and engineering |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation | $ 11,565 | $ 8,267 | $ 8,089

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