Annual report [Section 13 and 15(d), not S-K Item 405]

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

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Note 2 - Significant Accounting Policies - Antidilutive Securities (Details) - shares
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Antidilutive securities (in shares) 2,081,109 576,627
Restricted Stock Units (RSUs) [Member]    
Antidilutive securities (in shares) 1,028 1,311
Deferred Restricted Stock Units [Member]    
Antidilutive securities (in shares) 235,000 0
Common Stock Issuable [Member]    
Antidilutive securities (in shares) 112,185 28,019
Warrant [Member]    
Antidilutive securities (in shares) 1,476,200 524,601
Share-Based Payment Arrangement, Option [Member]    
Antidilutive securities (in shares) 256,474 22,474
Class A Preferred Shares [Member]    
Antidilutive securities (in shares) [1] 222 222
[1] Class A preferred shares are presented on an as-if converted basis.