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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 30, 2024 | Apr. 01, 2023 | Mar. 30, 2024 | Apr. 01, 2023
Income Statement [Abstract] |  |  |  |
Net revenue | $ 172,074 | $ 173,021 | $ 343,263 | $ 349,254
Cost of sales | 155,603 | 88,929 | 246,896 | 176,456
Gross profit | 16,471 | 84,092 | 96,367 | 172,798
Selling, general and administrative | 39,450 | 35,464 | 80,843 | 77,840
Research and development | 37,704 | 35,999 | 74,514 | 70,507
Impairment charges | 44,472 |  | 44,472 |
Operating expenses | 121,626 | 71,463 | 199,829 | 148,347
(Loss) / Income from operations | (105,155) | 12,629 | (103,462) | 24,451
Interest income | 8,848 | 8,000 | 18,747 | 14,559
Interest expense | (18) | (32) | (40) | (66)
(Loss) / Income before income taxes | (96,325) | 20,597 | (84,755) | 38,944
Provision for income taxes | 6,355 | 5,556 | 8,632 | 9,314
Net (loss) / income | $ (102,680) | $ 15,041 | $ (93,387) | $ 29,630
Net (loss) / income per share: |  |  |  |
Basic (in dollars per share) | $ (1.83) | $ 0.27 | $ (1.66) | $ 0.52
Diluted (in dollars per share) | $ (1.83) | $ 0.26 | $ (1.66) | $ 0.51
Weighted average shares outstanding: |  |  |  |
Basic (in shares) | 56,154 | 56,684 | 56,402 | 56,868
Diluted (in shares) | 56,154 | 57,577 | 56,402 | 57,739

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