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Note 11 - Shareholders' Deficit - Expected Share Issuances (Details) - shares
1 Months Ended 2 Months Ended
Aug. 11, 2025
Jul. 15, 2025
Jul. 11, 2025
Jun. 30, 2025
May 14, 2025
Aug. 14, 2025
Aug. 11, 2025
Jun. 30, 2025
Jun. 30, 2025
Conversion of the 2026 Notes Into Common Stock, Final Settlement [Member] | Subsequent Event [Member]                  
Number of shares (in shares) 389,556 528,197              
Conversion of the 2026 Notes Into Common Stock, Initial Settlement [Member] | Subsequent Event [Member]                  
Number of shares (in shares) 539,482   539,320            
Conversion of the 2026 Notes Into Common Stock [Member]                  
Number of shares (in shares)       539,320 10,000,000     539,320 539,320
Conversion of the 2026 Notes Into Common Stock [Member] | Subsequent Event [Member]                  
Number of shares (in shares)           1,996,555 1,996,555