Segment and Geographic Information - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) segment	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment	1
Number of operating segments | segment	1
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue | $	$ 167,729	$ 145,072	$ 129,959
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue | $	$ 14,400	$ 12,500	$ 13,000