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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Sep. 24, 2022
--- | --- | ---
Deferred tax assets [Abstract] |  |
Net operating loss carryforwards | $ 48,910 | $ 39,355
Allowance for doubtful accounts | 246 | 368
Inventory | 766 | 418
Deferred revenue | 519 | 526
Other accruals | 2,717 | 2,391
Total deferred tax assets | 53,158 | 43,058
Deferred tax liabilities [Abstract] |  |
Intangible assets | 208 | 1,191
Property, plant and equipment | 5,460 | 1,393
Total deferred tax liabilities | 5,668 | 2,584
Net deferred tax assets | 47,490 | 40,474
Valuation allowance | (46,163) | (39,442)
Net deferred tax assets | $ 1,327 | $ 1,032

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