Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017
Income Statement [Abstract]
Revenue	$ 110,948	$ 79,194	$ 211,586	$ 140,997
Cost of revenue	82,654	62,482	154,239	107,932
Gross profit	28,294	16,712	57,347	33,065
Operating expenses:
Research and development	13,804	8,613	25,829	16,597
Sales and marketing	13,068	7,363	24,280	13,084
General and administrative	6,318	3,344	11,196	6,089
Separation expense	11,269	0	17,826	0
Total operating expenses	44,459	19,320	79,131	35,770
Loss from operations	(16,165)	(2,608)	(21,784)	(2,705)
Other income (expense), net	(1,369)	593	(794)	933
Loss before income taxes	(17,534)	(2,015)	(22,578)	(1,772)
Provision for income taxes	288	137	607	356
Net loss	$ (17,822)	$ (2,152)	$ (23,185)	$ (2,128)
Net loss per share:
Basic (in dollars per share)	$ (0.29)	$ (0.03)	$ (0.37)	$ (0.03)
Diluted (in dollars per share)	$ (0.29)	$ (0.03)	$ (0.37)	$ (0.03)
Weighted average shares used to compute net loss per share:
Basic (in shares)	62,500	62,500	62,500	62,500
Diluted (in shares)	62,500	62,500	62,500	62,500