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Stockholders' Equity (Tables)
9 Months Ended
Sep. 30, 2019
Equity [Abstract]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The fair value of share-based awards was estimated using the Black-Scholes model with the following weighted-average assumptions for the nine months ended September 30, 2019 and 2018:

 

Assumptions:

 

    2019     2018  
Dividend yield     0.00       0.00  
Risk-free interest rate     1.42-2.53 %     2.68-3.05 %
Expected volatility     105.2-106.1 %     111.4-137.3 %
Expected life (in years)     5       5-10  

Schedule of Stock Option Activity

Option activity for the nine months ended September 30, 2019 and the year ended December 31, 2018 was as follows:

 

          Weighted Average     Weighted Average        
          Exercise     Remaining     Aggregate  
          Price     Contractual     Intrinsic  
    Options     ($)     Life (Yrs.)     Value ($)  
Options outstanding at December 31, 2017     299,938       4.57       7.33          
Granted     534,329       1.45       6.58          
Exercised     -       -       -          
Forfeited or cancelled     (8,000 )     4.59       -          
Options outstanding at December 31, 2018     826,267       2.49       6.47          
Granted     440,263       1.46       4.89          
Exercised     -       -       -          
Forfeited or cancelled     (15,500 )     1.76       -          
Options outstanding September 30, 2019     1,251,030       2.14       5.41         -  
Options expected to vest in the future as of September 30, 2019     446,582       1.66       5.07       -  
Options exercisable at September 30, 2019     804,448       2.40       5.61       -  
Options vested, exercisable, and options expected to vest at September 30, 2019     1,251,030       2.14       5.41       -  

Summary of Warrant Activity

Warrant activity for the nine months ended September 30, 2019 and 2018 was as follows:

 

          Weighted
Average
    Weighted Average  
          Exercise     Remaining  
          Price     Contractual  
    Warrants     ($)     Life (Yrs.)  
Warrants outstanding at December 31, 2017     1,645,500       3.97       4.11  
Granted     1,607,000       1.30       4.64  
Exercised     (24,000 )     2.00       -  
Forfeited or cancelled     -       -       -  
Warrants outstanding at September 30, 2018     3,228,500       2.65       4.14  
                         
Warrants outstanding at December 31, 2018     3,050,600       2.75       3.86  
Granted     640,240       1.60       4.68  
Exercised     (70,230 )     1.08       -  
Forfeited or cancelled     -       -       -  
Warrants outstanding at September 30, 2019     3,620,610       2.58       3.37