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Shareholders' Equity (Tables)
9 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Shareholders' Equity    
Schedule of Weighted Average Assumptions

The following weighted-average assumptions were used for stock option awards granted during the three and nine months ended September 30, 2019:

 

    Three months ended     Nine months ended  
    September 30, 2019     September 30, 2019  
Weighted average risk-free rate     1.39 %     1.70 %
Weighted average volatility     95.11 %     108.83 %
Dividend yield     0.00 %     0.00 %
Expected term     5.61 years       5.73 years  

The following weighted-average assumptions were used for grants issued during 2019 and 2018 under the ASC No. 718 requirements:

 

    2019     2018  
Weighted average risk-free rate     1.68 %     2.87 %
Weighted average volatility     105.53 %     113.20 %
Dividend yield     0.00 %     0.00 %
Expected term     5.37 years       7.06 years  

Schedule of Restricted Stock and Common Stock Unit Vested

The following table shows the number of RSUs that vested and were settled during the three and nine months ended September 30, 2020 and 2019, as well as the number of shares of common stock issued upon settlement. In lieu of paying cash to satisfy withholding taxes due upon the settlement of vested RSUs, an employee may elect to have shares of common stock withheld that would otherwise be issued at settlement, the value of which is equal to the amount of withholding taxes payable.

 

    Three months ended
September 30,
    Nine months ended
September 30,
 
    2020     2019     2020     2019  
Restricted stock units vested and settled     19,000       18,000       39,000       29,000  
Common stock issued, net of shares withheld     14,000       13,000       28,000       20,000  

 
Summary of Stock Option Activity  

Stock Option Activity

 

The following table summarizes stock option activities for the years ended December 31, 2019 and 2018:

 

    Outstanding
Options
    Weighted
Average Exercise
Price per Share
   

Weighted
Average
Remaining
Contractual
Life

(in years)

    Aggregate Intrinsic
Value
 
Outstanding January 1, 2018     156,000     $ 17.74     $ 7.12     $             -  
Granted     2,000       4.44       -       -  
Exercised     -       -       -       -  
Cancelled     (6,000 )     10.42       -       -  
Forfeited     (4,000 )     6.38       -       -  
Expired     (1,000 )     16.00       -       -  
Outstanding December 31, 2018     147,000       18.20       6.08       -  
Granted     3,000       3.15       -       -  
Exercised     -       -       -       -  
Cancelled     (6,000 )     13.32       -       -  
Forfeited     (2,000 )     6.24       -       -  
Expired     -       -       -       -  
Outstanding December 31, 2019     142,000     $ 18.26       5.14     $ -  
Options vested and exercisable at December 31, 2019     140,000     $ 18.43       5.10     $ -  

Summary of Restricted Stock Unit Activity  

The following table summarizes restricted stock unit activity for the years ended December 31, 2019 and 2018:

 

    Outstanding Restricted
Stock Units
    Weighted
Average Fair
Value per Share
 
January 1, 2018     -     $ -  
Granted     74,000       5.13  
Released     (13,000 )     6.04  
Canceled     -       -  
December 31, 2018     61,000     $ 4.94  
Granted     77,000       3.35  
Released     (38,000 )     4.09  
Cancelled     (43,000 )     4.17  
December 31, 2019     57,000     $ 3.57  
Balance expected to vest at December 31, 2019     19,000          

Summary of Warrant Activities  

Warrant Activity

 

The following summarizes warrant activities for the years ended December 31, 2019 and 2018:

 

      Outstanding Warrants     Weighted Average Exercise Price
per Share
    Weighted Average Remaining Contractual Life
(in years)
 
Outstanding January 1, 2018       72,000     $ 20.00       0.87  
Granted       -       -       -  
Exercised       -       -       -  
Forfeited       (72,000 )     -       -  
Outstanding December 31, 2018       -     $ -       -