Registration of securities issued in business combination transactions

STOCKHOLDERS' EQUITY (Details)

v3.20.4
STOCKHOLDERS' EQUITY (Details) - $ / shares
6 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2019
Sep. 30, 2020
Dec. 31, 2019
Dec. 31, 2019
Jun. 26, 2019
Jun. 07, 2019
Preferred Stock, Par or Stated Value Per Share   $ 0.0001 $ 0.0001 $ 0.0001    
Preferred Stock, Shares Authorized   1,000,000 1,000,000 1,000,000    
Preferred Stock, Shares Issued   0 0 0    
Preferred Stock, Shares Outstanding   0 0 0    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 66,673,530 66,563,478 66,619,951 66,619,951    
Class of Warrant or Right Warrants Expiration Period       5 years    
Class of Warrant or Right Warrants Redemption Price   $ 0.01   $ 0.01    
Share Price   $ 18.00 $ 18.00 $ 18.00    
Sponsor [Member]            
Equity Method Investment, Ownership Percentage   20.00% 20.00% 20.00%    
Class A Common Stock [Member]            
Common Stock, Shares Authorized   200,000,000 200,000,000 200,000,000    
Common Stock, Par or Stated Value Per Share   $ 0.0001 $ 0.0001 $ 0.0001    
Common Stock, Shares, Issued   2,436,522 2,380,049 2,380,049    
Common Stock, Shares, Outstanding   2,436,522 2,380,049 2,380,049    
Common Stock, Redemption Shares   66,563,478 66,619,951 66,619,951    
Share Price   $ 12.00 $ 12.00 $ 12.00    
Class B Common Stock [Member]            
Common Stock, Shares Authorized   20,000,000 20,000,000 20,000,000    
Common Stock, Par or Stated Value Per Share   $ 0.0001 $ 0.0001 $ 0.0001    
Common Stock, Shares, Issued   17,250,000 17,250,000 17,250,000    
Common Stock, Shares, Outstanding   17,250,000 17,250,000 17,250,000 17,250,000 11,500,000