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Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2022
Stockholders' Equity  
Schedule of Warrants Outstanding to Purchase Common Stock

The following table summarized our warrant activity for the fiscal years ended December 31, 2022 and 2021.

    

Number of

    

    

Warrants

Weighted

(in thousands)

Range

Average

Outstanding and exercisable at December 31, 2020

$

39

$

6.80

$

6.80

Granted

 

 

 

Outstanding and exercisable at December 31, 2021

$

39

$

6.80

$

6.80

Granted

 

111

 

8.11

 

8.00

Outstanding and exercisable at December 31, 2022

$

150

$

7.71

$

7.71

Fair values of options granted using weighted average assumptions

    

Year Ended December 31, 2022

    

Year Ended December 31, 2021

 

Expected dividend

0

%  

0

%

Risk-free interest rate

 

1.18 - 3.96

%  

1.41 - 1.62

%

Expected volatility

 

71

%  

122

%

Expected life

 

5 - 6 years

 

10 years