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Note 6 - Preferred Stock (Tables)
12 Months Ended
Dec. 31, 2024
Notes Tables  
Schedule of Stock by Class [Table Text Block]
  

Series F Preferred

  

Accrued

  

Weighted Average

  

Common Shares Issued

 
  

Stock Shares

  

Dividends

  

Conversion Price

  

from Conversions

 

March 31, 2023 Issuance

  6,550  $         

2023 Accrued Dividends

     $343,000         

2023 Conversions

  (4,620) $(207,000) $13.60   352,624 

December 31, 2023 Balance

  1,930  $136,000       352,624 

2024 Issuance

  1,648  $         

2024 Accrued Dividends

     $89,000         

2024 Conversions

  (3,033) $(196,000) $11.20   288,968 

December 31, 2024 Balance

  545  $29,000  $11.17   641,592 
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]

Issue Date

 

Warrants Issued

  

Exercise Price

 

Expiration Date

Q1 2023

  1,799,527  $3.41 

Q3 2028

Q2 2024

  472,676  $3.41 

Q4 2029

   2,272,203      
  

Outstanding

 
  

Number of Warrants

  

Weighted Average Exercise Price

 

Warrants outstanding and exercisable, December 31, 2022

  8,609  $2,653.80 

Granted

  113,597   10.17 

Exercised

  (18,681)  31.18 

Expired

  (72)  2,853.75 

Warrants outstanding and exercisable, December 31, 2023

  103,453   69.03 

Granted

  24,104   68.40 

Make-whole provision

  2,426,986   3.41 

Exercised

  (282,314)  3.41 

Expired

  (26)  2,575.38 

Warrants outstanding and exercisable, December 31, 2024

  2,272,203  $3.41 
Series F Preferred Warrants [Member]  
Notes Tables  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
  

Outstanding and Exercisable

 
  

Number of Warrants

  

Weighted Average Exercise Price

 

Warrants outstanding and exercisable, December 31, 2022

      

Granted

  32,750  $975 

Warrants outstanding and exercisable, December 31, 2023

  32,750  $975 

Exercised

  (1,648) $975 

Warrants outstanding and exercisable, December 31, 2024

  31,102  $975