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Stockholders' Equity (Tables)
3 Months Ended
Mar. 31, 2022
Stockholders' Equity  
Schedule of warrants issued and outstanding

The following table presents information about warrants that are issued and outstanding at March 31, 2022:  

Year Issued

    

Equity Instrument

    

Warrants Outstanding

    

Exercise Price

    

Date of Expiration

2018

 

Common Stock

699,962

$

72.00

 

6/21/2023

2019

 

Common Stock

331,858

$

37.50

 

2/7/2024

2021

Common Stock

498,356

$

2.10

12/14/2030

Total

 

1,530,176

 

 

Weighted average exercise price

$

41.75

 

Weighted average life in years

 

  

 

3.80