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Basis of Presentation and Summary of Significant Accounting Policies (Tables) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2022 | Mar. 26, 2022 | Dec. 31, 2021 | Sep. 25, 2021
Schedule of Calculation of Basic and Diluted Net Income (Loss) Per Ordinary Share |  | The following table sets forth the computation of basic and diluted loss per unit attributable to Class A Units and Class C Units (in thousands, except unit and per unit information) for the three and six month periods ending March 26, 2022 and March 27, 2021:
|  | Three Months Ended |  |  | Six Months Ended |
|  | March 26, 2022 |  |  | March 27, 2021 |  |  | March 26, 2022 |  |  | March 27, 2021 |
Basic and diluted loss attributable to Class A and Class C Units: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  | $ | (29,903 | ) |  | $ | (26,855 | ) |  | $ | (52,956 | ) |  | $ | (53,058 | )
Return on redeemable Preferred Units |  |  | (8,641 | ) |  |  | (8,231 | ) |  |  | (17,282 | ) |  |  | (16,460 | )
Loss attributable to Class A Units and Class C Units |  | $ | (38,544 | ) |  | $ | (35,086 | ) |  | $ | (70,238 | ) |  | $ | (69,518 | )
Weighted average units used in computing loss per unit attributable to Class A Units and Class C Units, basic and diluted |  |  | 6,872,944 |  |  |  | 6,426,203 |  |  |  | 6,682,894 |  |  |  | 6,426,203 |
Loss per unit attributable to Class A Units and Class C Units, basic and diluted |  | $ | (5.61 | ) |  | $ | (5.46 | ) |  | $ | (10.51 | ) |  | $ | (10.82 | )
|  | The following table sets forth the computation of basic and diluted loss per unit attributable to Class A Units and Class C Units (in thousands, except unit and per unit information):
|  | Year Ended |
|  | September 25, 2021 |  |  | September 26, 2020 |  |  | September 28, 2019 |
Basic and diluted loss attributable to Class A and Class C Units: |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  | $ | (122,314 | ) |  | $ | (109,521 | ) |  | $ | (104,361 | )
Returns on redeemable Preferred Units |  |  | (32,919 | ) |  |  | (29,565 | ) |  |  | (25,181 | )
Loss attributable to Class A Units and Class C Units |  | $ | (155,233 | ) |  | $ | (139,086 | ) |  | $ | (129,542 | )
Weighted average units used in computing loss per unit attributable to Class A Units and Class C Units, basic and diluted |  |  | 6,426,203 |  |  |  | 6,426,203 |  |  |  | 6,426,203 |
Loss per unit attributable to Class A Units and Class C Units, basic and diluted |  | $ | (24.16 | ) |  | $ | (21.64 | ) |  | $ | (20.16 | )
Schedule of estimated useful lives of property and equipment |  |  |  | Depreciation is computed using the straight-line method and depreciation expense is allocated between cost of revenue, research and development expenses, and selling, general, and administrative expenses on the statements of operations over the following estimated useful lives:
|  | Estimated Useful Life
Computer equipment and software, furniture and fixtures, and test equipment |  | 3-5 years
Leasehold improvements |  | Shorter of estimated useful life or remaining term of the lease
SVF INVESTMENT CORP. 3 [Member] |  |  |  |
Schedule of Calculation of Basic and Diluted Net Income (Loss) Per Ordinary Share | The table below presents a reconciliation of the numerator and denominator used to compute basic and diluted net loss per of ordinary share:
|  | For the Three Months Ended March 31, 2022 |  |  | For the Three Months Ended March 31, 2021 |
|  | Class A ordinary shares subject to possible redemption |  |  | Non- redeemable ordinary shares |  |  | Class A ordinary shares subject to possible redemption |  |  | Non- redeemable ordinary shares |
Basic and diluted net loss per ordinary share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocation of net loss |  | $ | (1,795,949 | ) |  | $ | (507,355 | ) |  | $ | (261,798 | ) |  | $ | (262,125 | )
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic and diluted weighted average ordinary share outstanding |  |  | 32,000,000 |  |  |  | 9,040,000 |  |  |  | 7,466,667 |  |  |  | 7,476,000 |
Basic and diluted net loss per ordinary share |  | $ | (0.06 | ) |  | $ | (0.06 | ) |  | $ | (0.04 | ) |  | $ | (0.04 | )
|  | The table below presents a reconciliation of the numerator and denominator used to compute basic and diluted net loss per of ordinary share:
|  | For the Year Ended December 31, 2021 |  |  | For the period from December 11, 2020 (inception) through December 31, 2020 |
|  | Class A ordinary shares |  |  | non-redeemable ordinary shares |  |  | Class A ordinary shares |  |  | non-redeemable ordinary shares |
Basic and diluted net loss per ordinary share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocation of net loss |  | $ | (4,856,235 | ) |  | $ | (1,619,518 | ) |  | $ | — |  |  | $ | (18,846 | )
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic and diluted weighted average ordinary share outstanding |  |  | 25,950,685 |  |  |  | 8,654,356 |  |  |  | 0 |  |  |  | 7,000,000 | (1)
Basic and diluted net loss per ordinary share |  | $ | (0.19 | ) |  | $ | (0.19 | ) |  | $ | — |  |  | $ | (0.00 | )
(1) | This number excludes an aggregate of up to 1,000,000 Class B ordinary shares (other than the founder shares transferred to the two independent directors) subject to forfeiture if the over-allotment option is not exercised in full or in part by the underwriters. (see Note 5)

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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