Summary of Significant Accounting Policies - Schedule of Roll Forward of Company's Allowance for Doubtful Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Receivables [Abstract]
Allowance for doubtful accounts, Beginning Balance	$ 1,993	$ 1,584	$ 1,317
Allowance for doubtful accounts, Charged to Statement of Operations	6,144	8,501	7,895
Allowance for doubtful accounts, Deductions	(6,369)	(8,092)	(7,628)
Allowance for doubtful accounts, Ending Balance	$ 1,768	$ 1,993	$ 1,584