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

Note 8 - Stock-based Incentive Plans - Fair Value of Stock Options Granted Using Black-scholes-merton Option Pricing Model (Details)

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Note 8 - Stock-based Incentive Plans - Fair Value of Stock Options Granted Using Black-scholes-merton Option Pricing Model (Details)
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dividend yield 0.00% 0.00%
Share-Based Payment Arrangement, Option [Member]    
Expected Volatility 98.00% 95.00%
Risk–free interest rate 4.08% 4.18%
Expected life of options (in years) (Year) 6 years 7 days 5 years 4 months 6 days