Quarterly report pursuant to Section 13 or 15(d)

Note 8 - Stockholders' Equity- Stock Warrants (Details)

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Note 8 - Stockholders' Equity- Stock Warrants (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Warrants, outstanding (in shares) 7,170,431 4,137,916  
Outstanding, weighted average exercise price (in dollars per share) $ 1.32 $ 3.30  
Outstanding, December 31, 2022 $ 1 $ 1,272 $ 1
Warrants, Granted (in shares)   3,432,598  
Granted, weighted average exercise price (in dollars per share)   $ 0.88  
Warrants, Exercised (in shares) (1,092,299) (400,083)  
Exercised, weighted average exercise price (in dollars per share) $ 0 $ 0  
Warrants, outstanding (in shares) 6,078,132 7,170,431 4,137,916
Outstanding, weighted average exercise price (in dollars per share) $ 1.55 $ 1.32 $ 3.30