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Note 13 - Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2025
Notes Tables  
Schedule of Share-Based Payment Award, Warrants, Valuation Assumptions [Table Text Block]

Risk-free interest rate

  3.42%

Expected term (in years)

  5 

Volatility

  113%

Dividend yield

  0%

Estimated annual forfeiture rate at the time of grant

  0%
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
  2023 Promissory Notes (1)  

2023 Registered Direct Offering (2)

  2023 Private Warrants (3)  2025 Underwriting Agreement (4)  

Total

 

Active warrants January 1, 2024

  6,250,000   481,100   2,850,000   -   9,581,100 

Issued warrants

  -   -   -   -   - 

Exercised warrants

  (3,675,000)  -   -   -   (3,675,000)

Expired warrants

  -   -   -   -   - 

Cancelled warrants

  (1,575,000)  -   -   -   (1,575,000)

Outstanding warrants December 31, 2024

  1,000,000   481,100   2,850,000   -   4,331,100 

Weighted average strike price of outstanding warrants as of December 31, 2024

 $2.00  $1.82  $3.25  $-  $2.80 

Intrinsic value of outstanding warrants as of December 31, 2024

 $-  $-  $-  $-  $- 

Shares of common stock issued for warrant exercises during the year ended December 31, 2024

  3,675,000   -   -   -   3,675,000 

Active warrants January 1, 2025

  1,000,000   481,100   2,850,000   -   4,331,100 

Issued warrants

  -   -   -   8,571,428   8,571,428 

Exercised warrants

  -   -   -   -   - 

Expired warrants

  -   -   -   -   - 

Cancelled warrants

  -   -   -   -   - 

Outstanding warrants December 31, 2025

  1,000,000   481,100   2,850,000   8,571,428   12,902,528 

Weighted average strike price of outstanding warrants as of December 31, 2025

 $2.00  $1.82  $3.25  $2.40  $2.54 

Intrinsic value of outstanding warrants as of December 31, 2025

 $-  $-  $-  $-  $- 

Shares of common stock issued for warrant exercises during the year ended December 31, 2025

  -   -   -   -   -