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Stock-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2020
Share-based Payment Arrangement [Abstract]  
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions

The following table provides the weighted average assumptions used in determining the fair value of the stock option awards granted during the three month periods ended March 31, 2020 and 2019.

 

    March 31, 2020   March 31, 2019
    (unaudited)
Risk-free interest rate     1.51 %     2.51 %
Expected life     6.0 years       6.0 years  
Expected volatility     128.87 %     127.81 %
Dividend yield     -       -