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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Dec. 31, 2022
Jan. 01, 2022
Income Statement [Abstract]    
Revenues $ 176,233 $ 460,888
Cost of sales 87,527 237,650
Gross profit 88,706 223,238
Selling, general and administrative 42,376 38,959
Research and development 34,508 33,169
Operating expenses 76,884 72,128
Income from operations 11,822 151,110
Interest income 6,559 471
Interest expense (34) (40)
Income before income taxes 18,347 151,541
Provision for income taxes 3,758 17,935
Net income $ 14,589 $ 133,606
Net income per share:    
Basic (in dollars per share) $ 0.26 $ 2.14
Diluted (in dollars per share) $ 0.25 $ 2.11
Weighted average shares outstanding:    
Basic (in shares) 57,051 62,385
Diluted (in shares) 57,729 63,316