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Note 7 - Segment Information - Segment Reporting (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Net interest income $ 10,865 $ 9,100  
Provision expense 145 479  
Noninterest income 3,113 3,235  
Noninterest expense 9,375 7,969  
Tax expense 1,241 1,055  
Net income 3,217 2,832  
Assets 1,036,732 883,517 $ 954,640
Banking [Member]      
Net interest income 9,390 7,671  
Provision expense 25 375  
Noninterest income 2,779 2,832  
Noninterest expense 8,582 7,194  
Tax expense 937 731  
Net income 2,626 2,202  
Assets 1,025,871 871,819  
Consumer Finance [Member]      
Net interest income 1,475 1,429  
Provision expense 120 104  
Noninterest income 334 403  
Noninterest expense 793 775  
Tax expense 304 324  
Net income 591 630  
Assets $ 10,861 $ 11,698