Summary of Significant Accounting and Reporting Policies and Recent Developments - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Concentration Risk [Line Items]
Allowance for credit loss (less than)	$ 0.2		$ 0.2
Top Insurance Partner | Revenue from Contract with Customer Benchmark | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage		44.00%
Two Insurance Partners | Revenue from Contract with Customer Benchmark | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage		22.00%
One Customer | Accounts Receivable | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%
Insurance Partner One | Revenue from Contract with Customer Benchmark | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	38.00%
Insurance Partner Two | Revenue from Contract with Customer Benchmark | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	14.00%
Customer One | 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%