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Common Stock Purchase Warrants (Tables)
 3 Months Ended
Mar. 31, 2022
Common Stock Purchase Warrants [Abstract]  
Warrant Activity
A summary of the warrant activity as of March 31, 2022 is as follows (dollars in thousands):

 
  
Warrants
    
Weighted
Average
Exercise Price
per share
    
Weighted Average
Remaining
Contractual Life
(years)
  
Outstanding at December 31, 2021
    
204,882,664
    
$
0.20
      
2.54
  
Exercised
    
(15,909,091
)
    
0.01
          
Issued
    
16,152,079
      
0.18
          
Outstanding at March 31, 2022
    
205,125,652
    
$
0.18
      
2.67