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Stockholders’ Equity (Tables)
9 Months Ended
Sep. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
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, 2021 and 2020:

 

Assumptions:

 

   2021   2020 
Dividend yield    0.00%   0.00%
Risk-free interest rate    0.190.70 %   0.22-1.52 %
Expected volatility    116.8- 123.8 %   114.0-117.0 %
Expected life (in years)    5    5 
Schedule of Stock Option Activity

Option activity for the nine months ended September 30, 2021 and the year ended December 31, 2020 was as follows:

 

       Weighted Average   Weighted Average     
       Exercise   Remaining   Aggregate 
       Price   Contractual   Intrinsic 
   Options   ($)   Life (Yrs.)   Value ($) 
Options outstanding at December 31, 2019   180,912    18.11    5.09    25,988 
Granted   579,998    2.55    4.57    - 
Exercised   -    -    -    - 
Forfeited or cancelled   (47,900)   22.62    -    - 
Options outstanding at December 31, 2020   713,010    5.15    4.40    477,802 
Granted   697,831    3.29    4.64    46,800 
Exercised   (5,204)   2.50    -    - 
Forfeited or cancelled   (5,230)   4.41    -    - 
Options outstanding September 30, 2021   1,400,407    4.24    4.14    267,577 
Options expected to vest in the future as of September 30, 2021   574,146    3.59    4.29    110,275 
Options exercisable at September 30, 2021   826,261    4.68    4.04    157,302 
Options vested, exercisable, and options expected to vest at September 30, 2021   1,400,407    4.24    4.14    267,577 
Summary of Warrant Activity

Warrant activity for the nine months ended September 30, 2021 and 2020 was as follows:

 

       Weighted Average   Weighted Average 
       Exercise   Remaining 
       Price   Contractual 
   Warrants   ($)   Life (Yrs.) 
Warrants outstanding at December 31, 2019   363,727    25.60    3.12 
Granted   1,481,995    3.22    4.89 
Exercised   -    -    - 
Forfeited or cancelled   -    -    - 
Warrants outstanding at September 30, 2020   1,845,722    7.64    4.39 
                
Warrants outstanding at December 31, 2020   1,881,429    7.57    4.16 
Granted   2,602,143    4.36    1.89 
Exercised   (495,641)   2.59    - 
Forfeited or cancelled   -    -    - 
Warrants outstanding at September 30, 2021   3,987,931    6.10    2.36 
Stock Appreciation Rights [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The fair value of SAR awards was estimated using the Black-Scholes model with the following weighted-average assumptions for the nine months ended September 30, 2021 and 2020:

Assumptions:

 

   2021   2020 
Dividend yield   0.00%   0.00%
Risk-free interest rate   0.4%   0.22%
Expected volatility   122.8%   116.8%
Expected life (in years)   5    5 
Schedule of Stock Option Activity

SARs activity for the nine months ended September 30, 2021 was as follows:

 

       Weighted Average   Weighted Average     
       Exercise   Remaining   Aggregate 
       Price   Contractual   Intrinsic 
   SARs   ($)   Life (Yrs.)   Value ($) 
                 
SARs outstanding at December 31, 2020   127,679    2.61    4.52    97,919 
Granted   242,945    3.43    4.86    - 
Exercised   -    -    -    - 
Forfeited or cancelled   -    -    -    - 
SARs outstanding September 30, 2021   370,624    3.15    4.49    51,955 
SARs expected to vest in the future as of September 30, 2021   250,975    3.19    4.52    29,687 
SARs exercisable at September 30, 2021   119,649    3.08    4.42    22,268 
SARs vested, exercisable, and options expected to vest at September 30, 2021   370,624    3.15    4.49    51,955