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Balance Sheet Components - Finite-lived intangible assets, future amortization expense (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Apr. 03, 2021 | Oct. 03, 2020
Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, gross carrying amount | $ 7,828 |
Accumulated amortization | (2,494) |
Finite-lived intangible assets, net carrying value | 5,334 |
Intangible assets, gross carrying amount (excluding goodwill) | 27,928 |
Intangible assets, net carrying value (excluding goodwill) | $ 25,434 | $ 26,394
Weighted-average remaining life | 3 years 1 month 2 days |
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] |  |
Remainder of fiscal 2021 | $ 971 |
2022 | 1,927 |
2023 | 1,246 |
2024 | 1,020 |
2025 | 170 |
2026 and thereafter | 0 |
Finite-lived intangible assets, net carrying value | 5,334 |
In progress research and development |  |
Finite-Lived Intangible Assets [Line Items] |  |
Indefinite-lived intangible assets (excluding goodwill) | 20,100 |
Technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, gross carrying amount | 7,789 |
Accumulated amortization | (2,468) |
Finite-lived intangible assets, net carrying value | $ 5,321 |
Weighted-average remaining life | 3 years 1 month 6 days |
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] |  |
Finite-lived intangible assets, net carrying value | $ 5,321 |
Other |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, gross carrying amount | 39 |
Accumulated amortization | (26) |
Finite-lived intangible assets, net carrying value | $ 13 |
Weighted-average remaining life | 8 months 1 day |
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] |  |
Finite-lived intangible assets, net carrying value | $ 13 |

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