Note 2 - Accounting Policies - Earnings Per Share (Details) - shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Weighted average number of common shares used for basic EPS (in shares)	30,716,802	31,704,923
Effect of dilutive stock options and restricted and deferred stock unit awards (in shares)	0	0
Weighted average number of common shares and dilutive potential common stock used for dilutive EPS (in shares)	30,716,802	31,704,923