Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Summary of Significant Accounting Policies - Antidilutive Securities (Details)

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Note 2 - Summary of Significant Accounting Policies - Antidilutive Securities (Details) - shares
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Antidilutive securities (in shares) 1,831,298 1,444,934
Warrant [Member]    
Antidilutive securities (in shares) 1,461,997 1,011,618
Share-Based Payment Arrangement, Option [Member]    
Antidilutive securities (in shares) 369,301 433,316