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Summary of Significant Accounting Policies - Supplemental Cash Flow Information (Detail) - USD ($) | 3 Months Ended |  |
--- | --- | --- | ---
Apr. 03, 2021 | Mar. 28, 2020 | Jan. 02, 2021 | Dec. 28, 2019
Accounting Policies [Abstract] |  |  |  |
Interest expense | $ 66,000 | $ 66,000 |  |
Income taxes | 1,118,000 | 3,886,000 |  |
Operating lease liabilities | 1,763,000 | 1,463,000 |  |
ROU assets obtained in exchange for lease liabilities | 3,316,000 | 8,144,000 |  |
Unpaid purchases of property and equipment | 1,608,000 | 4,240,000 |  |
Deposit release to acquire noncontrolling interest(1) | 3,374,000 | 0 |  |
Unsettled common stock proceeds from option exercises | 142,000 | 466,000 |  |
Cash and cash equivalents | 551,992,000 | 605,916,000 | $ 641,447,000 |
Restricted cash | 2,224,000 | 376,000 |  |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents | $ 554,216,000 | $ 606,292,000 | $ 645,004,000 | $ 568,075,000

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