General form of registration statement for all companies including face-amount certificate companies

Fair Value of Financial Instruments - Summary of Recurring basis (Parenthetical) (Detail)

v3.21.2
Fair Value of Financial Instruments - Summary of Recurring basis (Parenthetical) (Detail) - Convertible Bridge Notes [Member]
$ in Millions
Jun. 30, 2021
USD ($)
Mithril II, LP  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Debt instrument face value $ 15
VCVC [Member]  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Debt instrument face value $ 5