Note 10 - Earnings Per Share - Calculation of Basic and Diluted Weighted Average Common Shares (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Basic weighted average common shares outstanding (in shares)	6,736,764	6,685,599	6,730,263	6,683,407
Dilutive effect of options and unvested restricted shares (in shares)	3,928	22,284	0	8,406
Diluted weighted average shares outstanding (in shares)	6,740,692	6,707,883	6,730,263	6,691,813