Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Tables)

v3.19.2
Stockholders' Equity (Tables)
6 Months Ended
Jun. 30, 2019
Stockholders' Equity Note [Abstract]  
Schedule of share-based compensation, stock options, activity
    Shares Underlying Options     Weighted Average Exercise Price    

Weighted average

Remaining

Contractual 

Life(years)

   

Aggregate

Intrinsic

Value

 
Outstanding at December 31, 2018     302,772     $ 18.30       7.20     $ -  
Granted     99,072       2.32               -  
Forfeited     (21,448 )     13.09                  
Outstanding at June 30, 2019     380,396     $ 14.43       7.35     $ -  
Schedule of share-based compensation
    Three Months ended June 30,     Six Months ended June 30,  
    2019     2018     2019     2018  
Research and development   $ 3,758     $ 5,005     $ 7,475     $ 6,710  
Selling, general and administrative     146,404       902,909       630,644       1,641,092  
Total   $ 150,162     $ 907,914     $ 638,119     $ 1,647,802  
Schedule of share-based payment award, stock options, valuation assumptions
    For the six months ended June 30,  
    2019     2018  
Fair value of common stock   $ 2.32     $ $10.92 - $13.26  
Expected volatility     151.76 %     118.10% -118.83 %
Dividend yield   $ -     $ -  
Risk-free interest     2.70 %     2.87% -3.00 %
Expected life (years)     5.5       5.33  
Schedule of common stock warrant activity
    Number of Warrants     Weighted Average Exercise Price     Weighted Average Remaining Contractual Life (Years)  
Outstanding at December 31, 2018     863,084     $ 6.00       2.51  
Exercised, K Warrants     (277,778 )     0.06       -  
Outstanding at June 30, 2019     585,306     $ 9.79       3.20