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Warrants (Tables)
3 Months Ended
Mar. 31, 2023
Warrants [Abstract]  
Warrants Outstanding and Changes in Warrants to Purchase Common Stock

A summary of the warrants outstanding as of March 31, 2023 is as follows:

Exercise Price
 
Outstanding
 
Grant/Assumption Date
 
Expiration Date
24.42
   
7,051
 
June 28, 2013
 
June 28, 2023
57.11
   
603,386
 
December 21, 2020
 
December 21, 2030
33.63
   
301,291
 
August 9, 2021
 
August 9, 2031
22.51
   
153,155
 
December 17, 2021
 
December 17, 2031
22.51
   
153,155
 
December 17, 2021
 
December 17, 2031
65.23
   
617,050
 
December 1, 2022
 
April 23, 2025
65.23
   
760,086
 
December 1, 2022
 
December 1, 2026
Total
   
2,595,174
     


The following table below is a summary of changes in warrants to purchase common stock for the three months ended March 31, 2023:

   
Number of
Warrant
Shares
Outstanding
and
Exercisable
   
Exercise
Price
per Share
 
Balance as of December 31, 2022
   
2,721,267
       
Granted
   
-
       
Exercised
   
(126,093
)
 
$
0.06
 
Balance as of March 31, 2023
   
2,595,174