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Fair Value Measurements - Fair Value Measurements, Recurring and Nonrecurring (Detail) - USD ($)
Dec. 31, 2020
Aug. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Oct. 16, 2018
Apr. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Notes Receivable $ 0   $ 815,937 $ 7,424,727 $ 11,630,867  
Investments 923,581          
Liability of Redemption of Noncontrolling Interest   $ (11,200,000)        
Warrant Liability           $ (900,000)
Financial Instruments [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Cash and Cash Equivalents 83,757,785   46,667,334      
Notes Receivable     815,937      
Investments 40,794,806   14,068,821      
Liability of Redemption of Noncontrolling Interest     (5,500,000)      
Contingent Consideration Payable (27,100,000)   (58,936,739)      
Warrant Liability (39,454,000)   (15,879,843)      
FairValueNetAssetLiability 57,998,591   (18,764,490)      
Fair Value, Inputs, Level 1 [member] | Financial Instruments [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Cash and Cash Equivalents 83,757,785   46,667,334      
Investments 923,581          
Contingent Consideration Payable          
Warrant Liability          
FairValueNetAssetLiability 84,681,366   46,667,334      
Fair Value, Inputs, Level 2 [member] | Financial Instruments [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Cash and Cash Equivalents          
Investments          
Contingent Consideration Payable          
Warrant Liability          
FairValueNetAssetLiability          
Fair Value, Inputs, Level 3 [member] | Financial Instruments [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Cash and Cash Equivalents          
Notes Receivable     815,937      
Investments 39,871,225   14,068,821      
Liability of Redemption of Noncontrolling Interest     (5,500,000)      
Contingent Consideration Payable (27,100,000)   (58,936,739)      
Warrant Liability (39,454,000)   (15,879,843)      
FairValueNetAssetLiability $ (26,682,775)   $ (65,431,824)