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Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Unrecognized Tax Benefits, Ending Balance $ 0   $ 0   $ 0
Share-Based Payment Arrangement, Option [Member]          
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 1,891,013 1,632,242 1,891,013 1,632,242  
Warrant [Member]          
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 5,364,802 1,731,499 5,364,802 4,587,002  
Additional Stock Options [Member]          
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 560,000   560,000    
CANADA          
Cash $ 184   $ 184