Revenue Recognition - Summary of Revenues Disaggregated by Geography (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Disaggregation Of Revenue [Line Items]
Total revenue		$ 148,984	$ 187,689
UNITED STATES
Disaggregation Of Revenue [Line Items]
Total revenue		88,444	120,397
Other
Disaggregation Of Revenue [Line Items]
Total revenue	[1]	$ 60,540	$ 67,292

[1] No single country represented 10% of the Company’s revenues in the periods presented.