Property and Equipment (Details) - USD ($) $ in Thousands |
Sep. 27, 2019 |
Dec. 28, 2018 |
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Property, Plant and Equipment [Line Items] | |||||
Property and equipment, gross | $ 72,864 | $ 68,206 | |||
Less: accumulated depreciation and amortization | (23,397) | (17,309) | |||
Property and equipment, net | 49,467 | 50,897 | [1] | ||
Leasehold improvements | |||||
Property, Plant and Equipment [Line Items] | |||||
Property and equipment, gross | 33,769 | 33,941 | |||
Computer equipment and software | |||||
Property, Plant and Equipment [Line Items] | |||||
Property and equipment, gross | 17,017 | 15,022 | |||
Furniture and fixtures | |||||
Property, Plant and Equipment [Line Items] | |||||
Property and equipment, gross | 13,053 | 12,709 | |||
Laboratory equipment | |||||
Property, Plant and Equipment [Line Items] | |||||
Property and equipment, gross | 8,408 | 5,668 | |||
Construction in progress | |||||
Property, Plant and Equipment [Line Items] | |||||
Property and equipment, gross | $ 617 | $ 866 | |||
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