Note 7 - Fair Value of Financial Instruments (Details) - Quantitative Information About Level 3 Assets (Market Approach Valuation Technique [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2015		Dec. 31, 2014
Impaired Loans [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Appraised value range	16.00%		0.00%
Appraised value weighted average	(16.00%)		0.00%
Impaired Loans [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Appraised value range	91.00%		89.00%
Appraised value weighted average	(91.00%)		(89.00%)
Impaired Loans [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Appraised value range	31.00%	[1]	30.00%	[1]
Appraised value weighted average	(31.00%)	[1]	(30.00%)	[1]
Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value (in Dollars)	15,718		15,838
Valuation technique	Fair Value of Collateral (1)	[2]	Fair Value of Collateral (1)	[2]
Unobservable input	Appraised Value (2)	[3]	Appraised Value (2)	[3]
Other Real Estate Owned [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Appraised value range	7.00%		7.00%
Appraised value weighted average	(7.00%)		(7.00%)
Other Real Estate Owned [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Appraised value range	28.00%		39.00%
Appraised value weighted average	(28.00%)		(39.00%)
Other Real Estate Owned [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Appraised value range	12.00%	[1]	22.00%	[1]
Appraised value weighted average	(12.00%)	[1]	(22.00%)	[1]
Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value (in Dollars)	1,141		2,135
Valuation technique	Fair Value of Collateral (1)	[2]	Fair Value of Collateral (1)	[2]
Unobservable input	Appraised Value (2) Sales Price	[3]	Appraised Value (2) Sales Price	[3]
SBA Servicing Assets [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Appraised value range	(3.00%)	[4]	(3.00%)	[4]
Appraised value weighted average	3.00%	[4]	3.00%	[4]
SBA Servicing Assets [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value (in Dollars)	4,267		4,099
Valuation technique	Fair Value		Fair Value
Unobservable input	Individual Loan Valuation (3)	[4]	Individual Loan Valuation (3)	[4]

[1] The range and weighted average of qualitative factors such as economic conditions and estimated liquidation expenses are presented as a percent of the appraised value.

[2] Fair value is generally determined through independent appraisals of the underlying collateral, which include Level 3 inputs that are not identifiable.

[3] Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses.

[4] There is a lack of transactional data in this market place for the non-guaranteed portion of SBA loans.