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Fair Value Measurements, Changes in Fair Value of the Level 3 Liabilities (Details) - Level 3 [Member] - USD ($)
$ in Thousands
6 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at beginning of period $ 241,291 $ 204,293
Payments related to long-term debt (14,687) (14,687)
Exercise of Private Placement Warrants (28,090)  
Changes in fair value of debt and liability instruments, included in net loss $ 49,631 $ 37,705
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Gain (Loss) on Fair Value of Debt and Liability Instruments Gain (Loss) on Fair Value of Debt and Liability Instruments
Balance at end of period $ 248,145 $ 227,311