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Fair Value Measurements - Summary of the changes in the fair value of the FPA liability (Detail) - Fair Value, Recurring [Member] - Level 3 [Member] - USD ($)
 3 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Fair Value Liabilities Measured On Recurring Basis [Line Items]    
Beginning balance $ 2,050,000 $ 50,000
Recognized gain on change in fair value [1] (300,000) (2,000,000)
Ending balance $ 1,750,000 $ 2,050,000
[1] Represents the non-cash loss on change in valuation of the FPA liability and is included in Recognized loss on change in fair value of FPA liability on the statement of operations.