Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Income Statement [Abstract]
Revenue	$ 363,932	$ 347,200	$ 813,362	$ 932,646
Cost of revenue	228,120	239,248	529,586	627,027
Gross profit	135,812	107,952	283,776	305,619
Operating expenses:
Research and development	90,771	65,693	256,093	213,651
Sales and marketing	60,726	71,296	183,157	222,972
General and administrative	35,493	23,083	112,583	74,640
Total operating expenses	186,990	160,072	551,833	511,263
Operating loss	(51,178)	(52,120)	(268,057)	(205,644)
Interest income (expense), net	(268)	2,388	1,038	8,476
Other income (expense), net	965	(492)	3,198	1,242
Loss before income taxes	(50,481)	(50,224)	(263,821)	(195,926)
Income tax expense (benefit)	3,971	1,669	(125,566)	3,950
Net loss	$ (54,452)	$ (51,893)	$ (138,255)	$ (199,876)
Net loss per share:
Basic (in dollars per share)	$ (0.20)	$ (0.20)	$ (0.52)	$ (0.78)
Diluted (in dollars per share)	$ (0.20)	$ (0.20)	$ (0.52)	$ (0.78)
Shares used to compute net loss per share:
Basic (in shares)	270,443	258,753	267,958	256,046
Diluted (in shares)	270,443	258,753	267,958	256,046