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Note 11 - Stock Compensation - Estimate Valuation Assumptions (Details) - Performance Share Units [Member]
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Expect term (in years) (Year) 3 years 3 years
Risk-free interest rate 1.78% 0.18%
Dividend yield 1.67% 2.27%
Expected volatility 63.90% 62.80%