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Common stock warrants (Tables)
6 Months Ended
Jun. 30, 2023
Share-Based Payment Arrangement [Abstract]  
Schedule of common stock warrants

The following table summarizes Series B and Series D common stock warrants as of each period:

 

   Series B   Series D   B and D Total 
Outstanding at December 31, 2021  87,456   6,252,954   6,340,410 
Issued   -    -    - 
Exercised   (87,456)   (2,954)   (90,410)
Canceled               
Outstanding at December 31, 2022   -    6,250,000    6,250,000 
Issued   -    -    - 
Exercised   -    -    - 
Outstanding at June 30, 2023  -   6,250,000   6,250,000 

 

Series E, F, G, and H warrants were issued for investment banking and advisory services during 2009. Series E, F, and G warrants were exercised in 2014. On November 14, 2022, the 275,647 Series H Warrants of Lenox Hill Partners, LLC were cancelled pursuant to a Settlement Agreement. As of December 31, 2022, there were 413,512 Series H ($7) Warrants outstanding. The following table summarizes Series H ($7) warrants as of each period:

 

  

Series H

$7.00

exercise price

 
Outstanding at December 31, 2021   689,159 
Issued   - 
Canceled   275,647 
Exercised   - 
Outstanding at December 31, 2022   413,512 
      
Issued   - 
Exercised   - 
Outstanding at June 30, 2023   413,512