Note 7 - Segment Information - Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Net interest income	$ 11,510	$ 10,865
Provision expense	756	145
Noninterest income	3,076	3,113
Noninterest expense	9,808	9,375
Tax expense	656	1,241
Net income	3,366	3,217
Assets	1,096,421	1,036,732	$ 1,026,290
Banking [Member]
Net interest income	10,089	9,390
Provision expense	600	25
Noninterest income	2,672	2,779
Noninterest expense	9,068	8,582
Tax expense	461	937
Net income	2,632	2,626
Assets	1,085,123	1,025,871
Consumer Finance [Member]
Net interest income	1,421	1,475
Provision expense	156	120
Noninterest income	404	334
Noninterest expense	740	793
Tax expense	195	304
Net income	734	591
Assets	$ 11,298	$ 10,861