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v3.25.1

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ / shares in Units, £ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 USD ($) segment $ / shares shares | Dec. 31, 2023 USD ($) $ / shares shares | Dec. 31, 2022 USD ($) $ / shares shares | Aug. 19, 2021 USD ($) | Aug. 19, 2021 GBP (£)
Accounting Policies [Line Items] |  |  |  |  |
Investments in debt securities | $ 0 | $ 0 |  |  |
Long-lived assets impairment charges | $ 0 | 0 | $ 0 |  |
Investment received |  |  |  | $ 46,397,000 | £ 38,340
Employee maximum contribution, percentage of monthly salary | 8.33% |  |  |  |
Severance pay expenses | $ 987,000 | $ 1,069,000 | $ 1,217,000 |  |
Maximum exercise price of options granted (in USD per share) | $ / shares | $ 0.03 | $ 0.03 | $ 0.03 |  |
Potentially dilutive securities that were excluded from the computation of loss per share (in shares) | shares | 7,455,172 | 2,679,771 | 2,314,774 |  |
Revenues | $ 183,000 | $ 1,608,000 | $ 0 |  |
Cost of revenues | $ 3,681,000 | 3,270,000 | 547,000 |  |
Number of operating segments | segment | 1 |  |  |  |
Number of reportable segments | segment | 1 |  |  |  |
R&D tax credit benefits | $ 5,697,000 | 769,000 | 0 |  |
REE Platform Prototypes |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Revenues |  | 943,000 |  |  |
Cost of revenues |  | 943,000 |  |  |
SDV Prototypes |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Revenues | $ 183,000 | 665,000 | 0 |  |
United States |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Matching contribution, percentage of participant annual compensation | 4.00% |  |  |  |
Employer expenses related to defined contribution plan | $ 81,000 | $ 106,000 | $ 117,000 |  |
Foreign Plan |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Matching contribution, percentage of participant annual compensation | 6.00% | 6.00% | 6.00% |  |
Employer expenses related to defined contribution plan | $ 515,000 | $ 538,000 | $ 371,000 |  |
APC |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Non-royalty bearing grants received |  |  |  | 12,272,000 | 10,141
Investment received |  |  |  | 49,571,000 | 40,963
Reduction from research and development expense | $ 3,636,000 | $ 4,667,000 | $ 4,472,000 |  |
UK Government |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Non-royalty bearing grants received |  |  |  | $ 15,002,000 | £ 12,397

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