Revenues and Accounts Receivable - Schedule of Allowance for Doubtful Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenues And Accounts Receivable [Abstract]
Beginning Balance	$ 1,327	$ 453
Bad Debt Expense	4,532	1,246
Charged to Allowance	(2,633)	(546)
Other	1,039	175
Ending Balance	$ 4,265	$ 1,327