Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Income Statement [Abstract]
Net revenue	$ 280,052	$ 230,852	$ 510,015	$ 479,934
Cost of revenue	198,751	165,407	362,473	332,481
Gross profit	81,301	65,445	147,542	147,453
Operating expenses:
Research and development	21,144	18,814	40,883	37,646
Sales and marketing	34,384	34,541	67,415	70,396
General and administrative	15,481	10,463	28,615	23,580
Other operating expenses, net	1,425	1,301	1,093	1,497
Total operating expenses	72,434	65,119	138,006	133,119
Income from operations	8,867	326	9,536	14,334
Interest income	49	782	311	1,483
Other income (expense), net	314	487	(4,272)	828
Income before income taxes	9,230	1,595	5,575	16,645
Provision for income taxes	3,247	756	3,765	2,963
Net income	$ 5,983	$ 839	$ 1,810	$ 13,682
Net income per share
Basic	$ 0.20	$ 0.03	$ 0.06	$ 0.44
Diluted	$ 0.20	$ 0.03	$ 0.06	$ 0.42
Weighted average shares used to compute net income per share:
Basic	29,617	31,246	29,608	31,365
Diluted	30,070	32,112	30,079	32,518