Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 03, 2021	Apr. 04, 2020
Condensed Consolidated Statements of Income
Revenues	$ 255,505	$ 214,877
Cost of revenues	104,922	85,711
Gross profit	150,583	129,166
Operating expenses:
Research and development	76,474	71,223
Selling, general and administrative	51,950	53,996
Operating expenses	128,424	125,219
Operating income	22,159	3,947
Other income (expense):
Interest income and other, net	2,875	3,251
Interest expense	(11,324)	(5,541)
Income before income taxes	13,710	1,657
Provision (benefit) for income taxes	201	(587)
Net income	$ 13,509	$ 2,244
Earnings per share:
Basic (in dollars per share)	$ 0.31	$ 0.05
Diluted (in dollars per share)	$ 0.29	$ 0.05
Weighted-average common shares outstanding:
Basic (in shares)	44,160	43,642
Diluted (in shares)	45,832	44,388