Revenue Recognition - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Revenue Recognition [Line Items]
Period of revenue from services		1 month
Subscription revenue term, minimum		1 year
Subscription revenue term, maximum		3 years
Aggregate amount of transaction price from contractual obligations		$ 17,496
Scenario Forecast [Member]
Revenue Recognition [Line Items]
Amount to be recognized as revenue	$ 15,976