Business Information - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
United States
Segment Reporting Information [Line Items]
Long-lived assets	$ 29.1	$ 29.4
Revenue | Geographic Concentration Risk | United States
Segment Reporting Information [Line Items]
Percentage of revenue	59.00%	52.00%	67.00%
Revenue | Geographic Concentration Risk | United Kingdom
Segment Reporting Information [Line Items]
Percentage of revenue	13.00%	36.00%	12.00%
Revenue | One client | Customer Concentration Risk
Segment Reporting Information [Line Items]
Percentage of revenue	0.00%	14.00%	11.00%