Note 7 - Segment Information - Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Net interest income	$ 10,626	$ 10,763	$ 32,666	$ 32,913
Provision expense	444	962	2,015	1,695
Noninterest income	2,107	1,927	5,956	7,541
Noninterest expense	9,738	9,761	29,097	29,243
Tax expense	414	221	1,101	1,428
Net income	2,137	1,746	6,409	8,088
Assets	1,045,958	1,033,516	1,045,958	1,033,516	$ 1,030,493
Banking [Member]
Net interest income	10,048	10,168	30,173	30,289
Provision expense	450	950	1,900	1,550
Noninterest income	2,043	1,875	5,822	6,916
Noninterest expense	9,115	9,107	27,146	27,236
Tax expense	409	226	984	1,199
Net income	2,117	1,760	5,965	7,220
Assets	1,034,209	1,021,730	1,034,209	1,021,730
Consumer Finance [Member]
Net interest income	578	595	2,493	2,624
Provision expense	(6)	12	115	145
Noninterest income	64	52	134	625
Noninterest expense	623	654	1,951	2,007
Tax expense	5	(5)	117	229
Net income	20	(14)	444	868
Assets	$ 11,749	$ 11,786	$ 11,749	$ 11,786