Balance Sheet Components - Expected revenue recognition (Details) $ in Thousands	Jan. 01, 2022 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred revenue expected to be recognized	$ 75,578
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-02
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred revenue expected to be recognized	$ 13,561
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied in	9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-02
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred revenue expected to be recognized	$ 16,175
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied in	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred revenue expected to be recognized	$ 14,103
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied in	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-09-29
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred revenue expected to be recognized	$ 11,782
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied in	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-09-28
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred revenue expected to be recognized	$ 19,957
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied in