Revenue Recognition - Summary of Revenues Disaggregated by Geography (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Disaggregation Of Revenue [Line Items]
Total revenue		$ 27,951	$ 35,942
UNITED STATES
Disaggregation Of Revenue [Line Items]
Total revenue		16,216	22,619
Other
Disaggregation Of Revenue [Line Items]
Total revenue	[1]	$ 11,735	$ 13,323

[1] No single country outside of the United States represented 10% or more of the Company’s revenues in the periods presented.