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Stock-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2023
Stock-Based Compensation and Warrants  
Summary of stock option activity

A summary of stock option activity for the three months ended March 31, 2023 and the year ended December 31, 2022 is as follows:

    

    

Weighted

    

Weighted Average

    

Aggregate

Average Exercise

Remaining

Intrinsic

    

Options

    

Price

    

Contractual Life

    

Value

Balance - December 31, 2021

 

625,565

$

16.12

 

5.58 years

$

Granted

 

1,728,000

0.58

 

 

Exercised

 

Expired

 

(43,126)

67.81

 

 

Forfeited

 

(14,541)

3.61

 

 

Balance - December 31, 2022

2,295,898

3.53

6.44 years

Granted

Exercised

Expired

(429)

404.83

Forfeited

Balance - March 31, 2023 - outstanding

 

2,295,469

$

3.46

 

6.19 years

$

172,500

Balance - March 31, 2023 - exercisable

 

636,009

$

10.43

 

5.06 years

$

18,542

Grant date fair value of options granted – three months ended March 31, 2023

$

 

  

 

  

Weighted average grant date fair value – three months ended March 31, 2023

$

 

  

 

  

Grant date fair value of options granted – year ended December 31, 2022

$

706,264

 

  

 

  

Weighted average grant date fair value – year ended December 31, 2022

$

0.41