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Fair Value Measurements (Tables)
3 Months Ended
Mar. 31, 2021
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

Assets and liabilities measured at fair value are summarized below:

 

    Total Fair Value     Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1)    

Significant Other Observable Inputs

(Level 2)

   

Significant Unobservable Inputs

(Level 3)

 
Assets:                                
                                 
Recurring items as of March 31, 2021                                
Corporate debt securities, available for sale   $ 15,000,045     $     $ 15,000,045     $  
                                 
Non-recurring items as of March 31, 2021                                
In-process R&D (Note 8)   $ 13,366,234     $     $     $ 13,366,234  
                                 
Non-recurring items as of December 31, 2020                                
In-process R&D (Note 8)   $ 13,366,234     $     $     $ 13,366,234  
                                 
Liabilities:                                
                                 
Recurring items as of March 31, 2021                                
Earn-out milestone liability (Note 13)   $ 7,169,000     $     $     $ 7,169,000  
                                 
Recurring items as of December 31, 2020                                
Earn-out milestone liability (Note 13)   $ 7,018,000     $     $     $ 7,018,000