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Collaboration Agreements And Business Development Activities- Royalty Revenues under the Collaboration Agreement with Genentech (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2022	Apr. 02, 2021
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Royalty revenues on ex-U.S. sales	$ 355,980	$ 270,230
Collaborative Arrangement with Genentech | Cotellic
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Profits on U.S. commercialization	2,139	1,794
Royalty revenues on ex-U.S. sales	$ 1,628	$ 951

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