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Fair Value - Change in Fair Value of Derivative Warrant Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
FPA Put Option
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ (37,523)	$ 0
(Loss) gain recognized in other expense, net on the condensed consolidated statement of operations and comprehensive loss	(12,669)	(44,593)
Ending balance	(50,192)	(44,593)
Fixed Maturity Consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	(7,228)	0
(Loss) gain recognized in other expense, net on the condensed consolidated statement of operations and comprehensive loss	(376)	(6,967)
Ending balance	(7,604)	(6,967)
Shortfall Warrants
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance		0
(Loss) gain recognized in other expense, net on the condensed consolidated statement of operations and comprehensive loss		(5,104)
Ending balance		(5,104)
Warrants
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance		(2,119)
(Loss) gain recognized in other expense, net on the condensed consolidated statement of operations and comprehensive loss		(3,770)
Conversion of warrants to preferred shares		5,889
Ending balance		0
AM SAFE liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance		(28,986)
(Loss) gain recognized in other expense, net on the condensed 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		(1,989)
(Loss) gain recognized in other expense, net on the condensed 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 condensed consolidated statement of operations and comprehensive loss	9,675	30,600
Ending balance	(15,475)	(19,400)
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 condensed consolidated statement of operations and comprehensive loss	1,766	(477)
Ending balance	$ (2,148)	$ (2,625)

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- Definition

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Conversion of AM SAFE Warrant To Equity Classification

+ References

No definition available.

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Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Conversion of SAFE liability

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+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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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 2
-Subparagraph (c)(1)
-Publisher FASB
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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.

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Fair value 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.

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