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Customer ExAlt Trust Loan Payable (Details) - USD ($) | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Oct. 18, 2023 | Mar. 31, 2023 | Mar. 24, 2022 | Dec. 07, 2021
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Loan receivable fair value |  |  |  |  |  |  |  | $ 72,500,000 |
Proceeds from transfer of loan |  |  |  |  |  |  |  | $ 72,500,000 |
Loss on extinguishment of debt | $ 8,846,000 | $ 0 | $ 8,846,000 | $ 0 |  |  |  |  |
Customer ExAlt Trusts loan payable, net | $ 0 |  | 0 |  | $ 47,900,000 | $ 52,129,000 | [1] |  |
Derivative liability |  |  |  |  |  | 3,513,000 |  |  |
Loan payable, fair value disclosure |  |  | $ 56,700,000 |  |  |  |  |  |
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Loss on financial instruments, net (related party of $(18,691), $(20,480), $(64,217), and $(63,044), respectively) | Loss on financial instruments, net (related party of $(18,691), $(20,480), $(64,217), and $(63,044), respectively) | Loss on financial instruments, net (related party of $(18,691), $(20,480), $(64,217), and $(63,044), respectively) | Loss on financial instruments, net (related party of $(18,691), $(20,480), $(64,217), and $(63,044), respectively) |  |  |  |  |
Net amortization of debt premium and discount (related party of $(1,860) and $(4,605)) |  |  | $ (1,261,000) | $ (3,569,000) |  |  |  |  |
Customer ExAlt Trusts |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Alternative assets acquired |  |  |  |  |  |  |  |  | $ 352,600,000
Percentage allocated to payable repayment |  |  |  |  |  |  |  |  | 27.80%
Customer ExAlt Trusts |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Derivative liability | $ 1,900,000 |  | 1,900,000 |  |  | 3,500,000 |  |  |
Net gain on derivative liability | $ 0 | $ 1,300,000 | $ 1,600,000 | 5,100,000 |  |  |  |  |
Customer ExAlt Trusts | Loans Payable |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest rate | 12.00% |  | 12.00% |  |  |  |  |  |
Outstanding principal, including interest paid-in-kind |  |  |  |  | $ 50,900,000 | 54,200,000 |  |  |
Unamortized debt discount | $ 5,000,000 |  | $ 5,000,000 |  |  | $ 5,600,000 |  |  |
Maximum rate | 21.00% |  | 21.00% |  |  |  |  |  |
Net amortization of debt premium and discount (related party of $(1,860) and $(4,605)) | $ 100,000 | $ 500,000 | $ 600,000 | $ 1,000,000 |  |  |  |  |
[1] | Retroactively adjusted March 31, 2023 for the de-SPAC merger transaction as described in Note 4. Such adjustments are unaudited.

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