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Earn-out Milestone Liability (Tables)
 6 Months Ended
Jun. 30, 2019
Hercules Warrant [Member]  
Schedule of Changes in Earn-out Milestone Liability

The following is a summary of the changes in the earn-out milestone liability for 2019:

 

Balance at January 1, 2019  $(8,907,664)
Non-cash gain from the adjustment for the change in fair value   3,002,939 
Balance at June 30, 2019  $(5,904,725)
Schedule of Milestone Risk Adjustment Assessment

The following is a schedule of the Company’s risk-adjustment assessment of each milestone:

 

Date  

Risk-adjustment Assessment

of achieving each Milestone

     Discount Rate    

Estimated Time

to Achieve

                 
June 30, 2019     80%       9%     0.75 to 1.75 years
March 31, 2019     80%       9%     1.00 to 2.00 years
December 31, 2018     80%       9%     1.25 years
                     
June 30, 2019     35% to 80%       9%     0.83 to 1.00 years
March 31, 2018     35% to 80%       9%     1.08 to 1.25 years
December 31, 2017     35% to 80%       9%     1.33 to 1.50 years