Organization, Business and Summary of Significant Accounting Policies - Rollforward of Allowance for Doubtful Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Allowance for Doubtful Accounts [Roll Forward]
Balance at beginning	$ 5,564	$ 4,182
Charged to/reversed from expense	3,104	2,226
Deductions (write offs)	(1,182)	(844)
Balance at ending	$ 7,486	$ 5,564