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Note 12 - Share-based Compensation - Summary of Stock Option Valuation Assumptions (Details) - $ / shares
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Forfeiture rate 0.00% 0.00%
Weighted-average fair value of options granted (in dollars per share) $ 1.33 $ 0.88
Share-Based Payment Arrangement, Option [Member]    
Expected stock price volatility 76.00% 49.00%
Risk-free interest rate 4.21% 2.47%
Expected dividend yield 0.00% 0.00%
Expected life of options – years (Year) 6 years 5 years 11 months 15 days