Note 14 - Earnings Per Share - Computations of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net income	$ 76,516	$ 17,827	$ 7,900
Basic (in shares)	11,357	11,504	11,663
Dilutive effect of common stock equivalents (in shares)	75	32	97
Diluted weighted average common shares outstanding(1) (in shares)	11,432	11,536	11,760
Basic (in dollars per share)	$ 6.74	$ 1.55	$ 0.68
Diluted (in dollars per share)	$ 6.69	$ 1.55	$ 0.67