CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019
Revenues	$ 150,741	$ 115,908	$ 295,038	$ 273,116
Cost of sales	81,438	60,335	155,371	142,744
Gross profit	69,303	55,573	139,667	130,372
Selling, general and administrative	29,160	28,461	57,818	58,902
Research and development	29,067	29,577	57,359	59,380
Operating expenses	58,227	58,038	115,177	118,282
Income/(loss) from operations	11,076	(2,465)	24,490	12,090
Interest income	2,675	3,865	5,514	7,691
Interest expense	(661)	(254)	(1,244)	(505)
Income before income taxes	13,090	1,146	28,760	19,276
Provision for income taxes	1,162	4,672	3,295	15,242
Share of results of equity-method investee, net of tax	40	29	100	72
Net income/(loss)	$ 11,888	$ (3,555)	$ 25,365	$ 3,962
Net income/(loss) per share:
Basic (in dollars per share)	$ 0.19	$ (0.05)	$ 0.40	$ 0.06
Diluted (in dollars per share)	$ 0.19	$ (0.05)	$ 0.39	$ 0.06
Weighted average shares outstanding:
Basic (in shares)	63,679	65,930	63,675	66,530
Diluted (in shares)	64,219	65,930	64,266	67,344