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Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Jan. 30, 2022 | Jan. 31, 2021 | Jan. 26, 2020 | Jan. 27, 2019
--- | --- | --- | --- | ---
Non-current deferred tax assets: |  |  |  |
Inventory reserve | $ 5,734 | $ 4,435 |  |
Bad debt reserve | 26 | 23 |  |
Foreign tax credits | 3,304 | 1,974 |  |
Research credit carryforward | 13,498 | 9,700 |  |
NOL carryforward | 7,839 | 7,659 |  |
Goodwill and other intangibles | 0 | 690 |  |
Leasing deferred assets | 4,311 | 3,573 |  |
Payroll and related accruals | 11,743 | 10,248 |  |
Share-based compensation | 5,256 | 5,822 |  |
Foreign pension deferred | 1,412 | 2,020 |  |
Accrued sales reserves | 1,012 | 464 |  |
Research and development charges | 7,263 | 4,005 |  |
Other deferred assets | 2,239 | 3,253 |  |
Valuation allowance | (17,506) | (15,751) | $ (16,189) | $ (18,912)
Total non-current deferred tax assets | 46,131 | 38,115 |  |
Non-current deferred tax liabilities: |  |  |  |
Goodwill and other intangibles | (1,530) | 0 |  |
Property, plant and equipment | (6,990) | (6,820) |  |
Repatriation of foreign earnings | (4,709) | (2,538) |  |
Deferred Tax Liabilities, Leasing Deferred Liabilities | (4,139) | (3,415) |  |
Other non-current deferred tax liabilities | (2,093) | (835) |  |
Total non-current deferred tax liabilities | (19,461) | (13,608) |  |
Net deferred tax assets | $ 26,670 | $ 24,507 |  |

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