Summary of Significant Accounting and Reporting Policies and Recent Developments - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Dec. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Concentration Risk [Line Items]
Allowance for credit loss (less than)	$ 0.1	$ 0.1		$ 0.1
Insurance Partner One | Revenue from Contract with Customer Benchmark | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage				37.00%
Insurance Partner Two | Revenue from Contract with Customer Benchmark | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage				11.00%
Insurance Partner Three | Revenue from Contract with Customer Benchmark | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage				11.00%
Top Insurance Partner | Revenue from Contract with Customer Benchmark | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage					41.00%
Two Insurance Partners | Revenue from Contract with Customer Benchmark | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage					24.00%
One Customer | Accounts Receivable | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%
Customer Two | Accounts Receivable | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%
Large Insurance Partner 1 | Revenue from Contract with Customer Benchmark | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage		36.00%	38.00%
Large Insurance Partner 2 | Revenue from Contract with Customer Benchmark | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage		12.00%	24.00%