General form of registration statement for all companies including face-amount certificate companies

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.21.2
Summary of Significant Accounting Policies - Additional Information (Detail)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2021
USD ($)
Segment
Jun. 30, 2020
USD ($)
Jun. 30, 2021
USD ($)
Segment
Jun. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Segment
$ / shares
Dec. 31, 2019
USD ($)
Segment
Sales and marketing expenses, include advertising costs         $ 3.0 $ 5.4
Common Stock, Dividends, Per Share, Declared | $ / shares         $ 0  
Advertising expenses $ 1.2 $ 0.5 $ 3.0 $ 1.5    
Accounts Receivable [Member]            
Number of customer | Segment     0   0 0
Revenue Benchmark [Member]            
Number of customer | Segment 0   0   0 0
Valuation Technique, Discounted Cash Flow [Member] | Fair Value Measurements Level 2 [Member]            
Debt Instrument, Fair Value Disclosure         $ 4.7