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Significant Accounting Polices (Tables)
3 Months Ended
Mar. 31, 2021
Accounting Policies [Abstract]  
Schedule of Estimate Fair Value of Stock Options Granted

The following assumptions were used to estimate the fair value of stock options granted during the three months ended March 31, 2021 and 2020 using the Black-Scholes option pricing model:

 

2021

 

2020

 

 

Risk-free interest rate

0.37%

 

1.61%

 

 

Expected life (years)

6.25

 

6.25

 

 

Expected volatility

92.4%

 

60.0%

 

 

Dividend rate

0%

 

0%