Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2020	Jun. 29, 2019	Jul. 04, 2020	Jun. 29, 2019
Income Statement [Abstract]
Revenue	$ 261,272	$ 313,556	$ 449,430	$ 585,446
Cost of revenue	168,230	205,342	301,466	387,779
Gross profit	93,042	108,214	147,964	197,667
Operating expenses:
Research and development	83,733	70,919	165,322	147,958
Sales and marketing	65,470	83,060	122,431	151,676
General and administrative	35,049	24,865	77,090	51,557
Total operating expenses	184,252	178,844	364,843	351,191
Operating loss	(91,210)	(70,630)	(216,879)	(153,524)
Interest income, net	13	2,622	1,306	6,088
Other income, net	2,237	461	2,233	1,734
Loss before income taxes	(88,960)	(67,547)	(213,340)	(145,702)
Income tax expense (benefit)	15,137	971	(129,537)	2,281
Net loss	$ (104,097)	$ (68,518)	$ (83,803)	$ (147,983)
Net loss per share:
Basic (in dollars per share)	$ (0.39)	$ (0.27)	$ (0.31)	$ (0.58)
Diluted (in dollars per share)	$ (0.39)	$ (0.27)	$ (0.31)	$ (0.58)
Shares used to compute net loss per share:
Basic (in shares)	267,872	256,160	266,742	254,659
Diluted (in shares)	267,872	256,160	266,742	254,659