Balance Sheet Components - Accrued Liabilities (Details) - USD ($) $ in Thousands	Oct. 03, 2020	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Sales returns reserve	$ 93,297	$ 101,326
Accrued sales incentives	82,740	156,839
Employee-related liabilities	73,272	37,355
Product warranty	39,023	52,403
Inventory received but not billed	30,940	1,669
Accrued manufacturing expense and freight	23,313	35,112
Accrued co-op advertising and marketing development funds	22,888	40,689
Accrued research and development	20,832	19,232
Accrued sales and marketing	14,186	26,781
Sales taxes and VAT payable	10,364	19,603
Accrued legal settlements and fees	8,725	8,854
Finance lease liabilities	2,338	1,384
Derivative liabilities	0	748
Other accrued liabilities	9,297	11,535
Accrued liabilities	$ 431,215	$ 513,530