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Note 6 - Preferred Stock (Tables)
9 Months Ended
Sep. 30, 2025
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

 

December 31, 2023 Balance

  1,930  $136,000  $13.60   352,624 

2024 Issuances

  1,648           

2024 Accrued Dividends

     89,000        

2024 Conversions

  (3,033)  (196,000) $11.20   288,947 

December 31, 2024 Balance

  545   29,000  $11.17   641,571 

2025 Issuances

  575      3.77    

2025 Accrued Dividends

     29,000        

2025 Conversions

  (970)  (39,000) $3.77   257,617 

September 30, 2025 Balance

  150  $19,000  $3.77   899,188