Annual report pursuant to Section 13 and 15(d)

Note 13 - Employee and Director Benefits - Assumptions Used to Estimate Fair Value of Stock Option Awards (Details)

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Note 13 - Employee and Director Benefits - Assumptions Used to Estimate Fair Value of Stock Option Awards (Details) - Share-based Payment Arrangement, Option [Member]
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Expected price volatility 40.00% 35.39% 29.00%
Expected dividend yield 1.76% 1.24% 0.44%
Expected term (Year) 7 years 6 years 6 years
Risk-free rate 1.96% 2.90% 2.08%