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Note 7 - Segment Information (Details) - Segment Reporting - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Segment Reporting Information [Line Items]          
Net interest income $ 8,285 $ 8,208 $ 25,364 $ 25,177  
Provision expense (11) (682) 710 1,198  
Noninterest income 1,584 2,106 6,990 8,136  
Noninterest expense 7,727 7,244 22,708 21,536  
Tax expense 511 1,010 2,260 2,929  
Net income 1,642 2,742 6,676 7,650  
Assets 808,466 777,177 808,466 777,177 $ 778,668
Banking [Member]          
Segment Reporting Information [Line Items]          
Net interest income 7,627 7,612 22,690 22,593  
Provision expense 10 (715) 685 1,085  
Noninterest income 1,522 2,044 6,351 7,332  
Noninterest expense 7,106 6,684 20,679 19,657  
Tax expense 471 989 1,834 2,457  
Net income 1,562 2,698 5,843 6,726  
Assets 795,458 764,171 795,458 764,171  
Consumer Finance [Member]          
Segment Reporting Information [Line Items]          
Net interest income 658 596 2,674 2,584  
Provision expense (21) 33 25 113  
Noninterest income 62 62 639 804  
Noninterest expense 621 560 2,029 1,879  
Tax expense 40 21 426 472  
Net income 80 44 833 924  
Assets $ 13,008 $ 13,006 $ 13,008 $ 13,006