Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Income Statement [Abstract]
Net revenue	$ 378,114	$ 265,858	$ 888,129	$ 745,792
Cost of revenue	264,620	188,666	627,093	521,147
Gross profit	113,494	77,192	261,036	224,645
Operating expenses:
Research and development	24,529	19,537	65,412	57,183
Sales and marketing	39,794	33,491	107,209	103,887
General and administrative	16,467	11,887	45,082	35,467
Other operating expenses, net	538	212	1,631	1,709
Total operating expenses	81,328	65,127	219,334	198,246
Income from operations	32,166	12,065	41,702	26,399
Interest income	98	639	409	2,122
Other income (expense), net	(515)	(403)	(4,787)	425
Income before income taxes	31,749	12,301	37,324	28,946
Provision (benefit) for income taxes	6,214	(228)	9,979	2,735
Net income	$ 25,535	$ 12,529	$ 27,345	$ 26,211
Net income per share
Basic	$ 0.85	$ 0.41	$ 0.92	$ 0.84
Diluted	$ 0.83	$ 0.39	$ 0.90	$ 0.81
Weighted average shares used to compute net income per share:
Basic	30,037	30,933	29,746	31,221
Diluted	30,741	31,819	30,341	32,327