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Note 5 - Preferred Stock (Tables)
6 Months Ended
Jun. 30, 2024
Notes Tables  
Schedule of Stock by Class [Table Text Block]
  

Series F Preferred Stock Shares

  

Preferred Stock Dividends

  

Weighted Average Conversion Price

  

Common Shares Issued from Conversions

 

March 31, 2023 Issuance

  6,550  $        

2023 Accrued Dividends

     345,000        

2023 Conversions

  (4,620)  (209,000) $0.34   14,102,000 

December 31, 2023 Balance

  1,930   136,000       14,102,000 

2024 Issuances

  1,648           

2024 Accrued Dividends

     63,000        

2024 Conversions

  (3,033)  (195,000) $0.28   11,558,000 

June 30, 2024 Balance

  545  $4,000  $0.33   25,660,000