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Fair Value Measurements - Change in the Fair Value of the Derivative Warrant Liabilities (Detail) - Fair Value, Inputs, Level 3 [Member] - USD ($)
$ in Thousands
9 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Balance at beginning of period $ 217,993 $ 191,473
Fair value of liability instrument issued 38,634  
Changes in fair value of debt and liability instruments, included in net loss 29,247 31,577
Termination of DSP Options (61,472)  
Liability instruments disposed due to deconsolidation of subsidiary   (3,325)
Balance at end of period $ 224,402 $ 219,725