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Income Taxes (Tables)

12 Months Ended

Sep. 27, 2025

Income Tax Disclosure [Abstract]

Schedule of Income Before Provision For (Benefit From) Income Taxes

The Company’s income (loss) before provision for income taxes for fiscal 2025, 2024 and 2023 were as follows:

			September 27, 2025						September 28, 2024						September 30, 2023
(In thousands)
Domestic			$	(70,672)					$	(56,661)					$	(9,904)
Foreign			20,175						29,510						14,298
Income (loss) before provision for income taxes			$	(50,497)					$	(27,151)					$	4,394

Schedule of Provision For (Benefit From) Income Taxes

Components of the provision for income taxes consisted of the following:

			September 27, 2025						September 28, 2024						September 30, 2023
(In thousands)
Current:
U.S. Federal			$	3,776					$	8,094					$	7,507
U.S. State			2,363						4,023						4,947
Foreign			4,500						17,798						2,810
Total current			10,639						29,915						15,264
Deferred:
U.S. Federal			—						—						—
U.S. State			—						—						—
Foreign			8						(18,920)						(596)
Total deferred			8						(18,920)						(596)
Provision for income taxes			$	10,647					$	10,995					$	14,668

Schedule of Deferred Tax Assets and Liabilities

Components of the Company’s deferred income tax assets and liabilities are as follows:

			September 27, 2025						September 28, 2024
(In thousands)
Deferred tax assets
Capitalized research & development			$	131,858					$	107,474
Research & development tax credit carryforwards			51,752						58,156
Accrued expenses and reserves			18,979						17,070
Deferred revenue			14,363						15,374
Operating lease liability			13,165						14,259
Other capitalized costs			12,448						12,030
Stock-based compensation			6,973						8,195
Foreign net operating loss carryforwards			5,293						5,783
Depreciation			4,098						2,991
U.S. net operating loss carryforwards			3,889						2,296
Other			370						592
Total deferred tax assets			263,188						244,220
Valuation allowance			(238,268)						(216,365)
Deferred tax assets, net of valuation allowance			24,920						27,855
Deferred tax liabilities
Right-of-use asset			(9,788)						(10,955)
Intangibles			(2,675)						(3,392)
Capitalized inventory			(2,074)						(3,254)
Total deferred tax liabilities			(14,537)						(17,601)
Net deferred tax assets			$	10,383					$	10,254
Reported as
Deferred tax assets			$	10,509					$	10,314
Deferred tax liabilities			(126)						(60)
Net deferred tax assets			$	10,383					$	10,254

Schedule of Changes in Valuation Allowance

The following table summarizes changes in the valuation allowance for fiscal 2025, 2024 and 2023:

			September 27, 2025						September 28, 2024						September 30, 2023
(In thousands)
Beginning balance			$	216,365					$	185,840					$	162,267
Increase during the period			21,903						32,573						23,628
Decrease during the period			—						(2,048)						(55)
Ending balance			$	238,268					$	216,365					$	185,840

Schedule of Effective Income Tax Rate Reconciliation

Reconciliation of U.S. statutory federal income taxes to the Company’s provision for income taxes is as follows:

			September 27, 2025						September 28, 2024						September 30, 2023
(In thousands)
U.S. federal income taxes at statutory rate			$	(10,604)					$	(5,702)					$	923
U.S. state and local income taxes, net of federal benefit and state credits			(4,619)						(2,496)						(841)
Foreign income tax rate differential			991						1,544						734
Stock-based compensation			5,068						2,726						104
Federal research and development tax credits			(5,081)						(8,240)						(7,591)
Unrecognized federal tax benefits			457						1,082						184
Change in tax rate			(190)						(188)						—
Global intangible low taxed income, net of foreign tax credits			715						944						1,234
Foreign -derived intangible income (FDII) deduction			(1,000)						(1,519)						(6,863)
Subpart F income			697						733						1,374
162(m) executive compensation limitation			1,923						1,496						2,513
Deferred adjustments			—						504						—
Intercompany IP sale			—						(10,412)						—
Other			387						(121)						(695)
Change in valuation allowance			21,903						30,644						23,592
Provision for income taxes			$	10,647					$	10,995					$	14,668

Schedule of Changes in Unrecognized Tax Benefits

Change in gross unrecognized tax benefits, excluding interest and penalties, as a result of uncertain tax positions are as follows:

			September 27, 2025						September 28, 2024						September 30, 2023
(In thousands)
Beginning balance			$	18,910					$	17,619					$	17,021
Increase (decrease) - tax positions in prior periods			(207)						147						(566)
Increase - tax positions in current periods			904						1,144						1,164
Ending balance			$	19,607					$	18,910					$	17,619

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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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Tabular disclosure of income before income tax between domestic and foreign jurisdictions.

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Tabular disclosure of the change in unrecognized tax benefits.

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Tabular disclosure of valuation allowances to reduce deferred tax assets to net realizable value, including identification of the deferred tax asset more likely than not will not be fully realized and the corresponding amount of the valuation allowance.

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