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

Stock-based Compensation - Summary of Stock Options Activity (Detail)

v3.21.1
Stock-based Compensation - Summary of Stock Options Activity (Detail) - $ / shares
 3 Months Ended 12 Months Ended
Aug. 25, 2020
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Business Combinations [Abstract]            
Shares, Outstanding beginning balance   3,596,444 3,369,144 3,369,144 2,822,796  
Shares, Granted   68,628 0 227,300 546,348  
Shares, Exercised 13,301     0 0  
Shares, Forfeited       0 0  
Shares, Cancelled       0 0  
Shares, Outstanding ending balance       3,596,444 3,369,144 2,822,796
Weighted- Average Exercise Price Per Share, Beginning Balance   $ 2.27 $ 1.75 $ 1.75 $ 1.01  
Shares, Exercisable       3,274,444    
Weighted- Average Exercise Price Per Share, Granted       $ 10.00 5.57  
Shares, Vested and expected to vest       3,596,444    
Weighted- Average Exercise Price Per Share, Ending Balance       $ 2.27 $ 1.75 $ 1.01
Weighted- Average Exercise Price Per Share, Exercisable       1.68    
Weighted- Average Exercise Price Per Share, Vested or expected to vest       $ 2.27    
Weighted- Average Remaining Contractual Term, Granted (In Years)       6 years 11 months 23 days 5 years 7 months 24 days  
Weighted- Average Remaining Contractual Term (In Years)       7 years 8 months 23 days 7 years 9 months 10 days 8 years 2 months 8 days
Weighted- Average Remaining Contractual Term, Exercisable (In Years)       7 years 10 months 2 days    
Weighted- Average Remaining Contractual Term, Vested or expected to vest (In Years)       7 years 8 months 23 days