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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Dec. 30, 2023
Dec. 31, 2022
Income Statement [Abstract]    
Net revenue $ 171,189 $ 176,233
Cost of sales 91,293 87,527
Gross profit 79,896 88,706
Selling, general and administrative 41,393 42,376
Research and development 36,810 34,508
Operating expenses 78,203 76,884
Income from operations 1,693 11,822
Interest income 9,899 6,559
Interest expense (22) (34)
Income before income taxes 11,570 18,347
Provision for income taxes 2,277 3,758
Net income $ 9,293 $ 14,589
Net income per share:    
Basic (in dollars per share) $ 0.16 $ 0.26
Diluted (in dollars per share) $ 0.16 $ 0.25
Weighted average shares outstanding:    
Basic (in shares) 56,650 57,051
Diluted (in shares) 57,023 57,729