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Trust Account and Fair Value Measurement (Tables)
 9 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Fair Value Disclosures [Abstract]    
Schedule of assets measured at fair value on a recurring basis
           Quoted Price 
   Carrying value at   Gross Unrealized   Prices in
Active		 
Description  September 30,
2020		   Holding
Gain		   Markets
(Level 1)		 
Assets:            
Money market funds  $63,804,000   $
       -
   $63,804,000 
Total  $63,804,000   $
-
   $63,804,000 

 

           Quoted Price 
   Carrying value at   Gross Unrealized   Prices in
Active		 
Description  December 31,
2019		   Holding
Loss		   Markets
(Level 1)		 
Assets:            
Money market funds  $305,529,000   $
        -
   $305,529,000 
Total  $305,529,000   $
-
   $305,529,000 

 
           Quoted Price 
   Carrying value at       Prices in 
   December 31,   Gross Unrealized   Active Markets 
Description  2019   Holding Gain   (Level 1) 
Assets:            
Cash and money market  $302,529,000   $
       -
   $302,529,000 

 

           Quoted Price 
   Carrying value at       Prices in 
   December 31,   Gross Unrealized   Active Markets 
Description  2018   Holding Loss   (Level 1) 
Assets:            
Cash and money market  $1,000   $
-
   $1,000 
U.S. government treasury bills   304,034,000    (7,000)   304,027,000 
Total  $304,035,000   $(7,000)  $304,028,000