Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020
Income Statement [Abstract]
Net revenue		$ 308,811	$ 280,052	$ 626,736	$ 510,015
Cost of revenue		215,455	198,751	422,439	362,473
Gross profit		93,356	81,301	204,297	147,542
Operating expenses:
Research and development		22,586	21,144	46,415	40,883
Sales and marketing		35,740	34,384	73,555	67,415
General and administrative		15,623	15,481	31,028	28,615
Other operating expenses (income), net		(2,097)	1,425	468	1,093
Total operating expenses		71,852	72,434	151,466	138,006
Income from operations		21,504	8,867	52,831	9,536
Interest income		3	49	13	311
Other income (expense), net	[1]	696	314	134	(4,272)
Income before income taxes		22,203	9,230	52,978	5,575
Provision for income taxes		4,369	3,247	12,184	3,765
Net income		$ 17,834	$ 5,983	$ 40,794	$ 1,810
Net income per share
Basic		$ 0.58	$ 0.20	$ 1.33	$ 0.06
Diluted		$ 0.57	$ 0.20	$ 1.29	$ 0.06
Weighted average shares used to compute net income per share:
Basic		30,574	29,617	30,614	29,608
Diluted		31,464	30,070	31,648	30,079

[1] Amounts included gain/loss on investments, net, of $41,000 and $(8,000) for the three and six months ended June 27, 2021, respectively, and $0 and $(4.5) million for the three and six months ended June 28, 2020, respectively.