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Stockholders' Equity (Tables)
3 Months Ended
Mar. 31, 2020
Stockholders' Equity Note [Abstract]  
Schedule of changes in options outstanding

   Number
of
Options
   Weighted
Average
Exercise
Price For
Share
   Weighted
Average
Remaining
Contractual
Term
(Years)
   Aggregate
Intrinsic
Value
 
Outstanding and expected to vest at December 31, 2020   3,615,602   $19.96    9.2   $74,837,043 
Granted   600,000   $39.24    9.96   $- 
Exercised   (2,434)  $30.00    -   $- 
Forfeited   (215,312)  $21.58    -   $- 
Outstanding and expected to vest at March 31, 2020   3,997,856   $22.76    9.05   $60,969,194 
Options exercisable at March 31, 2020   834,719   $9.61    7.82   $21,228,752 

Schedule of changes in outstanding warrants
   Number of
Shares
   Weighted
Average
Exercise
Price Per
Share
 
Outstanding and vested at December 31,2020   3,646,872   $6.83 
           
Exercised   (484,117)   7.22 
Forfeited   (2,040)   16.00 
Outstanding and vested at March 31, 2020   3,160,715   $6.79 
Schedule of stock-based compensation expense
   Three
Months
Ended
March 31,
2020
   Three
Months
Ended
March 31,
2019
 
Research and development  $3,293,000   $36,200 
General and administrative   1,746,400    358,500 
Total  $5,039,400   $394,700