Summary of Accounts Payable and Accrued Expenses - Summary of Activity of Current Portion of Earnout Liability (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)
Payables And Accruals [Abstract]
Fair value of earnout at acquisition date (see Note 15)	$ 553
Fair value adjustment	1,190
Earnout accrued at end of year	$ 1,743