Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Revenue	$ 103,042	$ 103,469	$ 300,947	$ 303,856
Cost of revenue	40,736	42,030	120,502	124,727
Gross margin	62,306	61,439	180,445	179,129
Operating expenses:
Research and development	22,439	20,032	66,590	59,074
Selling, general, and administrative	23,758	21,078	70,797	61,618
Amortization of acquired intangible assets	603	3,389	3,846	10,168
Restructuring charges	2,692	252	4,178	4,719
Total operating expenses	49,492	44,751	145,411	135,579
Income from operations	12,814	16,688	35,034	43,550
Interest expense	(792)	(2,022)	(2,914)	(10,547)
Other expense, net	(70)	(61)	(83)	(2,017)
Income before income taxes	11,952	14,605	32,037	30,986
Income tax (benefit) expense	(655)	1,066	634	1,480
Net income	$ 12,607	$ 13,539	$ 31,403	$ 29,506
Net income per share:
Basic (in dollars per share)	$ 0.09	$ 0.10	$ 0.23	$ 0.22
Diluted (in dollars per share)	$ 0.09	$ 0.10	$ 0.22	$ 0.21
Shares used in per share calculations:
Basic (in shares)	135,598	132,997	134,903	132,065
Diluted (in shares)	141,524	138,894	140,763	137,679