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Note 12 - Stock-based Compensation - Schedule of Valuation Assumptions (Details)
6 Months Ended
Jun. 30, 2026
Expected volatility 140.00%
Minimum [Member]  
Expected term (years) (Year) 4 years 7 months 6 days
Risk-free interest rate 3.70%
Maximum [Member]  
Expected term (years) (Year) 4 years 10 months 24 days
Risk-free interest rate 4.20%