Acquisitions - Summary of Fair Value of Aggregate Consideration Payable (Detail) - FeedbackNow [Member] - USD ($) $ in Thousands		12 Months Ended
	Jul. 06, 2018	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Cash paid at close	$ 8,425	$ 2,700	$ 1,800
Working capital adjustment	798
Indemnity holdback	1,485	$ 1,000	$ 500
Contingent purchase price	3,388
Total	$ 14,096