Warrants Payable - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Jan. 07, 2021
Mar. 21, 2017
Sep. 30, 2015
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Oct. 05, 2020
Dec. 31, 2017
Nov. 30, 2016
Class Of Warrant Or Right [Line Items]                    
Class of warrant or right, number of securities called by warrants or rights                 122,052 139,629
Exercise price of warrants                 $ 3.45 $ 2.61
Expiration date     Sep. 02, 2022              
Change in fair value of warrants payable       $ (85,506) $ 2,237 $ 80,328 $ 2,909      
Warrants exercisable commencing date       Apr. 24, 2021            
Warrants outstanding, aggregate value       $ 62,039   $ 97,782 $ 17,672      
Redemption Of Warrant Price Per Share Equals Or Exceeds 18.00 [Member]                    
Class Of Warrant Or Right [Line Items]                    
Exercise price of warrants       $ 0.01            
Class of warrant or right, minimum threshold written notice period for redemption of warrants       30 days            
Closing price of share for threshold consecutive trading days       20 days            
Share Price       $ 18.00            
Redemption Of Warrant Price Per Share Equals Or Exceeds 10.00 [Member]                    
Class Of Warrant Or Right [Line Items]                    
Redemption price per warrant       $ 0.10            
Class of warrant or right, minimum threshold written notice period for redemption of warrants       30 days            
Closing price of share for threshold consecutive trading days       20 days            
Stock price trigger for redemption of public warrants       $ 10.00            
Share Price       $ 18.00            
Common Stock [Member]                    
Class Of Warrant Or Right [Line Items]                    
Class of warrant or right, number of securities called by warrants or rights     2,100,000     4,342,956        
Exercise price of warrants     $ 1.04     $ 0.5039        
Additional shares of warrants     2,100,000     4,342,956        
Series D Preferred Stock [Member]                    
Class Of Warrant Or Right [Line Items]                    
Class of warrant or right, number of securities called by warrants or rights   1,266,284       2,618,770        
Exercise price of warrants   $ 9.38       $ 4.5346   $ 0    
Warrant or right, reason for issuance, description       In conjunction with the Loan Facility effective March 21, 2017, the Corporation issued warrants to purchase 1,266,284 shares of the Corporation’s Series D preferred stock at an exercise price of $9.38 per share, which expire on September 30, 2027. The warrants are exercisable at any time up to the expiration date. Per the original terms, in the event of an automatic conversion of the preferred stock prior to the exercise of the warrants, the warrants shall be exercisable in common stock.   In conjunction with the Loan Facility effective March 21, 2017, the Corporation issued warrants to purchase 2,618,770 shares of the Corporation’s Series D preferred stock at an exercise price of $4.5346 per share, which expire on September 30, 2027. The warrants are exercisable at any time and up to the expiration date. Per the original terms, in the event of an automatic conversion of the preferred stock prior to the exercise of the warrants, the warrants shall be exercisable in common stock.        
Change in fair value of warrants payable   $ 1,200                
Series D Preferred Stock [Member] | Merger Agreement With S C H [Member]                    
Class Of Warrant Or Right [Line Items]                    
Date of purchase agreement       Oct. 05, 2020   Oct. 05, 2020        
Class B Common Stock                    
Class Of Warrant Or Right [Line Items]                    
Stock issued upon conversion       139,444,346            
Share Price $ 10.00                  
Class B Common Stock | Merger Agreement With S C H [Member]                    
Class Of Warrant Or Right [Line Items]                    
Class of warrant or right, number of securities called by warrants or rights 3,484,154                  
Stock issued upon conversion 7,205,490                  
Class A Common Stock | Public Warrants [Member]                    
Class Of Warrant Or Right [Line Items]                    
Class of warrant or right, number of securities called by warrants or rights 27,599,938     27,599,938            
Exercise price of warrants       $ 11.50            
Warrants outstanding, aggregate value       $ 44,400            
Class A Common Stock | Private Placement Warrant [Member]                    
Class Of Warrant Or Right [Line Items]                    
Class of warrant or right, number of securities called by warrants or rights 10,933,333     10,933,333            
Exercise price of warrants       $ 11.50            
Warrants outstanding, aggregate value       $ 17,600