Note 7 - Premises and Equipment (Details) - Components of Premises and Equipment (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Premises and equipment	$ 22,189	$ 19,742
Less: accumulated depreciation and amortization	(9,894)	(8,849)
Premises and equipment, net	12,295	10,893
Land [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	1,915	1,915
Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	195	195
Bank Buildings [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	9,099	8,581
Furniture, Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	10,392	8,252
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	$ 588	$ 799