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

Stockholder's Equity - Additional Information (Detail)

v3.21.2
Stockholder's Equity - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
 9 Months Ended
Sep. 30, 2021
Sep. 08, 2021
Feb. 03, 2021
Dec. 31, 2020
Dec. 31, 2019
Preferred stock, shares authorized 100,000,000     100,000,000 100,000,000
Common stock, shares authorized 300,000,000     300,000,000 300,000,000
Common stock, par value $ 0.0001     $ 0.0001 $ 0.0001
Common stock, shares issued 116,116,000     35,582,000 31,074,000
Common stock, shares outstanding 113,324,000 31,625   34,692,000 31,074,000
Exercise price of warrants $ 0.11   $ 0.11    
Class of Warrant or Right, Outstanding       12,300,000  
Earn Out shares 2,400,000        
Maximum [Member]          
Warrants and Rights Outstanding, Maturity Date       Oct. 31, 2029  
Minimum [Member]          
Warrants and Rights Outstanding, Maturity Date       Jan. 10, 2022  
Class A Common Stock [Member]          
Common stock, shares authorized       300,000,000.0  
Common stock, shares issued 116,100,000     35,600,000  
Common stock, shares outstanding 113,300,000     34,700,000  
Exercise price of warrants       $ 0.01  
Class of Warrant or Right, Outstanding 1.8        
Sponsor earn-out shares          
Financial liabilities $ 15.4        
Loss on fair value adjustment $ 2.2