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Note 10 - Equity Transactions (Tables)
12 Months Ended
Dec. 31, 2023
Notes Tables  
Schedule of Share-based Compensation, Stock Warrants Activity [Table Text Block]

Warrants outstanding, December 31, 2021

    2,048,186  

Issued

    -  

Exercised

    -  

Expired

    (2,340 )

Warrants outstanding, December 31, 2022

    2,045,846  

Issued

    18,825,700  

Exercised

    (5,037,993 )

Expired

    (87,707

)

Warrants outstanding, December 31, 2023

    15,745,846  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]

Warrants Issued

   

Exercise Price

 

Expiration Date

             
58,930     $ 35  

February 2024

2,400     $ 25  

October 2024

57,600     $ 25  

October 2024

302,379     $ 9.37  

November 2024

80,000     $ 25  

April 2025

35,200     $ 65  

December 2025

2,223     $ 11  

September 2025

283,111     $ 15  

August 2027

1,078,796     $ 5  

December 2025

57,500     $ 6.25  

December 2025

2,608,596     $ 1.36  

January 2026

156,522     $ 2.02  

December 2027

2,608,596       1.36   January 2028
3,695,227     $ 0.95  

October 2028

718,566     $ 0.71  

April 2030

4,000,000     $ 1.25  

August 2030

15,745,846