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Fair Value Measurements - Fair Value Measurements, Recurring and Nonrecurring (Detail) - USD ($)
Sep. 30, 2020
Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments $ 675,594  
Warrant Liability (18,513,000) $ (15,879,843)
Financial Instruments [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and Cash Equivalents 78,091,073 46,667,334
Notes Receivable   815,937
Investments 22,210,999 14,068,821
Liability of Redemption of Noncontrolling Interest (5,500,000)
Contingent Consideration Payable (36,315,360) (58,936,739)
Warrant Liability (18,513,000) (15,879,843)
FairValueNetAssetLiability 45,473,712 (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 78,091,073 46,667,334
Investments 675,594  
Liability of Redemption of Noncontrolling Interest  
Contingent Consideration Payable  
Warrant Liability  
FairValueNetAssetLiability 78,766,667 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  
Liability of Redemption of Noncontrolling Interest  
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 21,535,406 14,068,821
Liability of Redemption of Noncontrolling Interest (5,500,000)
Contingent Consideration Payable (36,315,360) (58,936,739)
Warrant Liability (18,513,000) (15,879,843)
FairValueNetAssetLiability $ (33,292,954) $ (65,431,824)