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Revenues - Net Product Revenues Disaggregated by Product (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2020	Jun. 28, 2019	Jul. 03, 2020	Jun. 28, 2019
Disaggregation of Revenue [Line Items]
Net product revenues	$ 259,479	$ 240,275	$ 486,394	$ 455,762
Net product revenues
Disaggregation of Revenue [Line Items]
Net product revenues	178,730	193,675	372,610	373,256
CABOMETYX
Disaggregation of Revenue [Line Items]
Net product revenues	173,610	189,015	362,826	364,905
COMETRIQ
Disaggregation of Revenue [Line Items]
Net product revenues	$ 5,120	$ 4,660	$ 9,784	$ 8,351

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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