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Fair Value - Schedule of Change in Fair Value of Derivative Warrant Liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Convertible Note |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | $ 0 |
Conversion of warrants to preferred shares | (40,150) |
(Loss) gain recognized in other expense, net on the consolidated statement of operations and comprehensive loss | (10,962) |
Ending balance | (51,112) | $ 0
FPA Put Option |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | (37,523) | 0
Partial settlement of Forward Purchase Agreement | 30,000 |
(Loss) gain recognized in other expense, net on the consolidated statement of operations and comprehensive loss | (22,492) | (37,523)
Ending balance | (30,015) | (37,523)
Fixed Maturity Consideration |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | (7,228) | 0
Partial settlement of Forward Purchase Agreement | 4,123 |
(Loss) gain recognized in other expense, net on the consolidated statement of operations and comprehensive loss | (1,018) | (7,228)
Ending balance | (4,123) | (7,228)
FPA Warrants |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | 0 | 0
(Loss) gain recognized in other expense, net on the consolidated statement of operations and comprehensive loss |  | (3,063)
Reclassification of warrant to equity |  | 3,063
Ending balance |  | 0
Warrants on Preferred Shares |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | 0 | (2,119)
Conversion of warrants to preferred shares |  | (5,889)
(Loss) gain recognized in other expense, net on the consolidated statement of operations and comprehensive loss |  | (3,770)
Ending balance |  | 0
AM SAFE liability |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | 0 | (28,986)
(Loss) gain recognized in other expense, net on the consolidated statement of operations and comprehensive loss |  | (744)
Conversion of SAFE liability to equity classification |  | 29,730
Ending balance |  | 0
AM SAFE warrant |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | 0 | (1,989)
(Loss) gain recognized in other expense, net on the consolidated statement of operations and comprehensive loss |  | 189
Reclassification of warrant to equity |  | 1,800
Ending balance |  | 0
Brookfield SAFE |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | (25,150) | (50,000)
(Loss) gain recognized in other expense, net on the consolidated statement of operations and comprehensive loss | 11,927 | 24,850
Ending balance | (13,223) | (25,150)
Private Placement Warrants |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | (3,914) | 0
Recognized as a result of the Business Combination |  | (2,148)
(Loss) gain recognized in other expense, net on the consolidated statement of operations and comprehensive loss | 2,482 | (1,766)
Ending balance | $ (1,432) | $ (3,914)

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- Definition Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Amount of issuances of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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