Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Revenue	$ 408,120	$ 404,093	$ 398,799
Cost of revenue	162,814	165,671	179,360
Gross margin	245,306	238,422	219,439
Operating expenses:
Research and development	89,223	78,617	82,449
Selling, general, and administrative	95,331	82,542	91,054
Amortization of acquired intangible assets	4,449	13,558	17,690
Restructuring charges	3,937	4,664	17,349
Impairment of acquired intangible assets	0	0	12,486
Acquisition related charges	0	0	1,531
Total operating expenses	192,940	179,381	222,559
Income (loss) from operations	52,366	59,041	(3,120)
Interest expense	(3,702)	(11,731)	(20,600)
Other expense, net	(208)	(2,245)	(249)
Income (loss) before income taxes	48,456	45,065	(23,969)
Income tax expense	1,064	1,572	2,353
Net income (loss)	$ 47,392	$ 43,493	$ (26,322)
Net income (loss) per share:
Net income per share - basic (in dollars per share)	$ 0.35	$ 0.33	$ (0.21)
Net income per share - diluted (in dollars per share)	$ 0.34	$ 0.32	$ (0.21)
Shares used in per share calculations:
Basic (in shares)	135,220	132,471	126,564
Diluted (in shares)	141,276	137,274	126,564