Annual report pursuant to Section 13 and 15(d)

Note 3 - Summary of Significant Accounting Policies - Antidilutive Securities (Details)

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Note 3 - Summary of Significant Accounting Policies - Antidilutive Securities (Details) - shares
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Antidilutive securities (in shares) 4,084,918 3,181,650
Employee and Non-employee Stock Options [Member]    
Antidilutive securities (in shares) 3,871,013 2,782,248
Common Share Purchase Warrants [Member]    
Antidilutive securities (in shares) 0 265,000
Common Stock, Deferred Stock Units Settlement [Member]    
Antidilutive securities (in shares) 213,905 134,402