Balance Sheet Components - Finite-lived intangible assets, future amortization expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 30, 2023	Sep. 30, 2023
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 31,931
Accumulated Amortization	(13,193)
Foreign Currency Translation	7
Net Carrying Value	18,745
In-process research and development not subject to amortization, Foreign Currency Translation	1,094
In-process research and development not subject to amortization, Net	72,846	$ 69,791
Intangible assets, gross carrying amount (excluding goodwill)	103,690
Intangible assets, net carrying value (excluding goodwill)	$ 91,591
Weighted-Average Remaining Life	4 years 9 months
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Remainder of fiscal 2024	$ 4,479
2025	3,372
2026	3,043
2027	3,027
2028	2,910
2029 and thereafter	1,914
Net Carrying Value	18,745
In-process research and development not subject to amortization
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets (excluding goodwill)	71,759
In-process research and development not subject to amortization, Foreign Currency Translation	1,087
In-process research and development not subject to amortization, Net	72,846
Trade name
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	451
Accumulated Amortization	(131)
Foreign Currency Translation	7
Net Carrying Value	$ 327
Weighted-Average Remaining Life	4 years 3 months
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Net Carrying Value	$ 327
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	31,480
Accumulated Amortization	(13,062)
Foreign Currency Translation
Net Carrying Value	$ 18,418
Weighted-Average Remaining Life	4 years 9 months 3 days
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Net Carrying Value	$ 18,418