Note 7 - Segment Information - Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Net interest income	$ 10,653	$ 10,640	$ 22,040	$ 22,150
Provision expense	(806)	(23)	1,571	733
Noninterest income	2,003	2,538	3,849	5,614
Noninterest expense	9,791	9,674	19,359	19,482
Tax expense	592	551	687	1,207
Net income	3,079	2,976	4,272	6,342
Assets	1,034,975	1,025,364	1,034,975	1,025,364	$ 1,030,493
Banking [Member]
Net interest income	10,088	10,032	20,125	20,121
Provision expense	(800)		1,450	600
Noninterest income	1,960	2,369	3,779	5,041
Noninterest expense	9,211	9,061	18,031	18,129
Tax expense	585	512	575	973
Net income	3,052	2,828	3,848	5,460
Assets	1,023,466	1,014,033	1,023,466	1,014,033
Consumer Finance [Member]
Net interest income	565	608	1,915	2,029
Provision expense	(6)	(23)	121	133
Noninterest income	43	169	70	573
Noninterest expense	580	613	1,328	1,353
Tax expense	7	39	112	234
Net income	27	148	424	882
Assets	$ 11,509	$ 11,331	$ 11,509	$ 11,331