Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurement - Convertible Note (Details)

v3.20.2
Fair Value Measurement - Convertible Note (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2020
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Change in fair value for the period   $ 12,200,000
Convertible Note, at fair value    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair value, liability, beginning balance   39,020,000
Conversion of Convertible Note II into common stock   (148,977,683)
Change in fair value for the period   111,057,683
Change in fair value for the period, attributed to changes in credit risk   (74,100,000)
Fair value, liability, ending balance $ 0 0
Convertible Note, at fair value | Credit Risk    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Change in fair value for the period, attributed to changes in credit risk   (1,100,000)
Convertible Note II, at fair value    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair value, liability, beginning balance   0
Fair value of Convertible Note II on issuance   68,925,000
Conversion of Convertible Note II into common stock   0
Change in fair value for the period 52,900,000 52,892,001
Fair value, liability, ending balance $ 121,817,001 121,817,001
Convertible Note II, at fair value | Credit Risk    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Change in fair value for the period, attributed to changes in credit risk   $ 0