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Note 12 - Stock-based Compensation - Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions (Details) - Stock Incentive Plan 2014 [Member] - New Options [Member]
3 Months Ended
Mar. 31, 2023
Risk-free interest rate 3.30%
Expected term (in years) (Year) 2 years 8 months 4 days
Expected price volatility 123.53%
Dividend yield 0.00%