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Stockholders' Equity (Tables)
9 Months Ended
Sep. 30, 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, 2019   3,615,602   $19.96    9.2   $74,837,043 
Granted   950,000   $39.82    9.54   $2,256,000 
Exercised   (239,865)  $3.98    -   $- 
Forfeited   (215,312)  $21.57    -   $- 
Outstanding  at September 30, 2020   4,110,425   $25.40    8.72   $61,858,297 
Options exercisable at September 30, 2020   982,608   $13.87    7.77   $24,526,894 
Schedule of changes in outstanding warrants
   Number of
Shares
   Weighted
Average
Exercise
Price Per
Share
 
Outstanding and vested at December 31, 2019   3,646,872   $6.83 
Granted   122,000    31.69 
Exercised   (1,081,581)   7.34 
Forfeited   (13,026)   16.00 
Outstanding  at September 30, 2020   2,674,265   $7.77 
Warrants exercisable at September 30, 2020   2,646,141   $7.81 
Schedule of stock-based compensation expense
   Nine
Months
Ended
September 30,
2020
   Nine
Months
Ended
September 30,
2019
 
Research and development  $4,635,300   $259,400 
General and administrative   12,951,200    1,296,500 
Total  $17,586,500   $1,555,900