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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Apr. 01, 2023
Apr. 02, 2022
Apr. 01, 2023
Apr. 02, 2022
Income Statement [Abstract]        
Revenues $ 173,021 $ 384,282 $ 349,254 $ 845,170
Cost of sales 88,929 182,572 176,456 420,222
Gross profit 84,092 201,710 172,798 424,948
Selling, general and administrative 35,464 35,088 77,840 74,047
Research and development 35,999 37,281 70,507 70,450
Operating expenses 71,463 72,369 148,347 144,497
Income from operations 12,629 129,341 24,451 280,451
Interest income 8,000 470 14,559 941
Interest expense (32) (97) (66) (137)
Income before income taxes 20,597 129,714 38,944 281,255
Provision for income taxes 5,556 13,713 9,314 31,648
Net income $ 15,041 $ 116,001 $ 29,630 $ 249,607
Net income per share:        
Basic (in dollars per share) $ 0.27 $ 1.89 $ 0.52 $ 4.03
Diluted (in dollars per share) $ 0.26 $ 1.86 $ 0.51 $ 3.97
Weighted average shares outstanding:        
Basic (in shares) 56,684 61,482 56,868 61,934
Diluted (in shares) 57,577 62,435 57,739 62,907