Revenue Recognition - Summary of Revenues Disaggregated by Geography (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Disaggregation Of Revenue [Line Items]
Total revenue		$ 23,634	$ 27,951
UNITED STATES
Disaggregation Of Revenue [Line Items]
Total revenue		12,190	16,634
Other
Disaggregation Of Revenue [Line Items]
Total revenue	[1]	$ 11,444	$ 11,317

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