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

Note 7 - Stockholders' Equity - Stock Warrants (Details)

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Note 7 - Stockholders' Equity - Stock Warrants (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Warrants, outstanding (in shares) 1,476,200 524,601  
Outstanding, weighted average exercise price (in dollars per share) $ 8.64 $ 32.42  
Outstanding, aggregate intrinsic value $ 0 $ 0 $ 1
Warrants, Granted (in shares)   1,861,817  
Granted, weighted average exercise price (in dollars per share)   $ 6.23  
Warrants, Exercised (in shares)   (910,218)  
Exercised, weighted average exercise price (in dollars per share)   $ 10.16  
Warrants, Expired (in shares) (703,459)    
Expired, weighted average exercise price (in dollars per share) $ 6.52    
Warrants, outstanding (in shares) 772,741 1,476,200 524,601
Outstanding, weighted average exercise price (in dollars per share) $ 10.56 $ 8.64 $ 32.42