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Cash and cash equivalents (Detail) - USD ($) $ in Thousands | Dec. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Cash |  |
Fair Value Measurements [Line Items] |  |
Amortized Cost | $ 109,299 | $ 196,106
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Estimated Fair Value | 109,299 | 196,106
Money market securities |  |
Fair Value Measurements [Line Items] |  |
Amortized Cost | 52,159 | 101,581
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Estimated Fair Value | 52,159 | 101,581
Total cash equivalents |  |
Fair Value Measurements [Line Items] |  |
Amortized Cost | 52,159 | 101,581
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Estimated Fair Value | 52,159 | 101,581
Total cash and cash equivalents |  |
Fair Value Measurements [Line Items] |  |
Amortized Cost | 161,458 | 297,687
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Estimated Fair Value | $ 161,458 | $ 297,687

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