Quarterly report pursuant to Section 13 or 15(d)

Note 17 - Stock-based Compensation Plans - Weighted Average of the Assumptions Utilized for Stock Options (Details)

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Note 17 - Stock-based Compensation Plans - Weighted Average of the Assumptions Utilized for Stock Options (Details) - Share-based Payment Arrangement, Option [Member]
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dividend yield 2.30% 3.00%
Expected volatility 53.30% 53.10%
Risk-free interest rate 0.70% 1.50%
Expected life of stock options granted during the period (in years) (Year) 5 years 10 months 24 days 5 years 10 months 24 days