Note 25 - Supplemental Disclosure for Earnings Per Share - Supplemental Disclosure for Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net income	$ 2,403	$ 2,915	$ 2,860	$ 2,147	$ 2,496	$ 2,524	$ 2,100	$ 2,133	$ 1,587	$ 2,109	$ 2,190	$ 1,553	$ 10,325	$ 9,253	$ 7,439
Weighted average common shares outstanding (in shares)													3,332,869	3,328,422	3,325,032
Basic (in dollars per share)	$ 0.72	$ 0.87	$ 0.86	$ 0.64	$ 0.75	$ 0.76	$ 0.63	$ 0.64	$ 0.49	$ 0.63	$ 0.66	$ 0.46	$ 3.10	$ 2.78	$ 2.24
Add: Dilutive effect of restricted stock (in shares)													11,203	6,972	4,531
Weighted average common shares outstanding, as adjusted (in shares)													3,344,072	3,335,394	3,329,563
Diluted (in dollars per share)	$ 0.72	$ 0.87	$ 0.86	$ 0.64	$ 0.75	$ 0.76	$ 0.63	$ 0.64	$ 0.48	$ 0.63	$ 0.66	$ 0.46	$ 3.09	$ 2.77	$ 2.23