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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2024
Summary of Reconciliation of Cash, Cash Equivalents and Restricted Cash | The following table provides a reconciliation of cash, cash equivalents and restricted cash included in the consolidated balance sheets to the amounts included in the consolidated statements of cash flows (in thousands):
|  | December 31, |  |  | December 31, |
|  | 2024 |  |  | 2023 |
Cash and cash equivalents |  | $ | 54,393 |  |  | $ | 35,665 |
Restricted cash |  |  | 2,447 |  |  |  | 2,416 |
Total cash, cash equivalents and restricted cash in the consolidated statements of cash flows |  | $ | 56,840 |  |  | $ | 38,081 |
Summary of Loans and Financing Receivable | Accounts receivable consists of the following (in thousands):
|  | December 31, |  |  | December 31, |
|  | 2024 |  |  | 2023 |
Billed accounts receivable |  | $ | 6,516 |  |  | $ | 8,564 |
Unbilled accounts receivable |  |  | 3,672 |  |  |  | 2,903 |
Total accounts receivable |  | $ | 10,188 |  |  | $ | 11,467 |
Schedule of Excess and Obsolescence Reserve | The following table summarizes the activity in the Company’s excess and obsolescence reserve against materials and supplies (in thousands):
|  | 2024 |  |  | 2023 |
Beginning balance |  | $ | 65 |  |  | $ | — |
Provisions |  |  | 1,331 |  |  |  | 65 |
Recoveries |  |  | (55 | ) |  |  | — |
Ending balance |  | $ | 1,341 |  |  | $ | 65 |
Summary of Property Plant And Equipment Useful Life | Depreciation is calculated using the straight-line method over the estimated useful lives of the assets. Useful lives are as follows:
Computer equipment and acquired computer software |  | 3 – 5 years
Machinery, equipment, furniture and fixtures |  | 4 – 7 years
Quantum computing systems |  | 3 years
Leasehold improvements |  | Shorter of the lease term or the estimated useful life of the related asset
Schedule of Earnings Per Share, Basic and Diluted | The following table sets forth the computation of basic and diluted loss per share attributable to common stockholders (in thousands, except share and per share data):
|  | Year Ended December 31, |
Numerator: |  | 2024 |  |  | 2023 |  |  | 2022 |
Net loss attributable to common stockholders |  | $ | (331,647 | ) |  | $ | (157,771 | ) |  | $ | (48,511 | )
Denominator: |  |  |  |  |  |  |  |  |
Weighted average shares used in computing net loss per share attributable to common stockholders— basic and diluted |  |  | 213,029,365 |  |  |  | 202,576,492 |  |  |  | 197,727,642 |
Net loss per share attributable to common stockholders—basic and diluted |  | $ | (1.56 | ) |  | $ | (0.78 | ) |  | $ | (0.25 | )
Summary of Antidilutive Securities Excluded from Computation of Earnings Per Share | The following is a summary of the weighted average common stock equivalents for the securities outstanding during the respective periods that have been excluded from the computation of diluted net loss per common share:
|  | Year Ended December 31, |
|  | 2024 |  |  | 2023 |  |  | 2022 |
Common stock options outstanding |  |  | 19,147,636 |  |  |  | 23,518,426 |  |  |  | 22,951,439 |
Warrants to purchase common stock |  |  | 7,559,312 |  |  |  | 8,301,202 |  |  |  | 8,301,202 |
Public warrants |  |  | 5,014,121 |  |  |  | 5,230,613 |  |  |  | 5,231,750 |
Unvested restricted stock units |  |  | 16,203,257 |  |  |  | 13,726,782 |  |  |  | 4,418,852 |
Unvested performance-based restricted stock units |  |  | 1,980,589 |  |  |  | 542,905 |  |  |  | — |
Unvested common stock |  |  | 307,473 |  |  |  | 654,442 |  |  |  | 1,158,095 |
Total |  |  | 50,212,388 |  |  |  | 51,974,370 |  |  |  | 42,061,338 |

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