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Note 4 - Capital Stock - Summary of Common Stock Outstanding (Details) - shares
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Sep. 30, 2023
Jun. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Issuances related to warrant exercises (in shares)             8,516  
Less Treasury Shares: (in shares) (189)         (189)   (189)
Common stock, outstanding (in shares) 1,071,356         1,071,356   573,455
Common Stock [Member]                
Issued Shares (in shares)     573,644,000     573,644,000 208,018,000 208,018,000
Issuances from Preferred Stock conversions (in shares)   198,912 90,056 49,143 3,669 288,968,000   352,624,000
Issuances related to warrant exercises (in shares) 208,933       8,516     18,681,000
Issuances related to stock compensation (in shares)     0   4,491   4,491 4,491,000
Common shares exchanged for prepaid warrants (in shares)       10,170       (10,170,000)
Issuances from Common Warrant Exercises (in shares)           208,933,000    
Issued Shares (in shares) 1,071,545,000         1,071,545,000   573,644,000
Less Treasury Shares: (in shares) (189,000)         (189,000)    
Common stock, outstanding (in shares) 1,071,356,000         1,071,356,000