Quarterly report pursuant to Section 13 or 15(d)

Temporary Equity and Stockholders' Equity - Additional Information (Detail)

v3.21.2
Temporary Equity and Stockholders' Equity - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
 9 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Dec. 21, 2020
Class of Stock [Line Items]      
Common stock shares authorized 315,000,000 55,659,643  
Common stock shares issued 71,810,419 30,281,520  
Common stock shares outstanding 71,810,419 30,281,520  
Preferred stock, redemption price per share     $ 1,000
Series A Preferred Stock [Member]      
Class of Stock [Line Items]      
Preferred stock shares authorized 7,765,229    
Preferred stock shares issued 0 7,756,158  
Preferred stock shares outstanding 0 7,756,158  
Preference share discount rate 2.00%    
Preferred stock, dividend rate, percentage 13.00%    
Preferred stock, redemption amount $ 85.2    
Series A-1 Preferred Stock      
Class of Stock [Line Items]      
Preferred stock shares authorized 10,480,538    
Preferred stock shares issued 0 7,862,107  
Preferred stock shares outstanding 0 7,862,107  
Preference share discount rate 2.00%    
Preferred stock, dividend rate, percentage 13.75%    
Preferred stock, redemption amount $ 86.9    
Preferred stock redemption premium rate 1.00%    
Series C Convertible Preferred Stock [Member]      
Class of Stock [Line Items]      
Preferred stock shares authorized 6,872,894    
Preferred stock shares issued 0 2,566,186  
Preferred stock shares outstanding 0 2,566,186  
Preferred stock, convertible, terms 1.5X    
Convertible preferred stock, shares issued upon conversion 16,802    
Series B Preferred Stock [Member]      
Class of Stock [Line Items]      
Preferred stock shares authorized 9,090,975    
Preferred stock shares issued 0 9,090,975  
Preferred stock shares outstanding 0 9,090,975  
Preferred stock, dividend rate, percentage 10.00%    
Preferred stock, redemption amount $ 97.8    
Capital Stock [Member]      
Class of Stock [Line Items]      
Capital units, authorized 350,000,000    
Common stock shares authorized 315,000,000    
Common stock shares issued 71,810,419    
Common stock shares outstanding 71,810,419    
Preferred stock shares authorized 35,000,000    
Preferred stock shares issued 0    
Preferred stock shares outstanding 0    
Common Stock [Member]      
Class of Stock [Line Items]      
Convertible preferred stock, shares issued upon conversion 2,520,368