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Industry Segment, Geographic Information and Significant Customers - Additional Information (Detail) - segment | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 26, 2020 | Sep. 28, 2019 | Sep. 26, 2020 | Sep. 28, 2019
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Number of Reportable Segments |  |  | 1 |
Document Period End Date |  |  | Sep. 26, 2020 |
Revenue Benchmark [Member] | Amazon [Member] | Customer Concentration Risk [Member] |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Concentration Risk, Percentage | 26.60% | 29.60% | 26.40% | 25.00%

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