Fair Value Measurements - Summary of Reconciliation of Liabilities Measured at Fair Value Using Significant Unobservable Inputs (Level 3) (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning	$ 920	$ 822
Change in fair value of warrants	1,969
Change in fair value of contingent consideration	19	98
Balance at ending	2,780	$ 920
Private Warrants [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Increase in warrant liabilities	$ 1,841