Note 7 - Fair Value of Financial Instruments (Details) - Quantitative Information about Level 3 Assets - Market Approach Valuation Technique [Member] - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2015	Dec. 31, 2014
Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value (in Dollars)		$ 5,896	$ 15,838
Valuation technique	[1]	Fair Value of Collateral (1)	Fair Value of Collateral (1)
Unobservable input	[2]	Appraised Value (2)	Appraised Value (2)
Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value (in Dollars)		$ 11,312	$ 2,135
Valuation technique	[1]	Fair Value of Collateral (1)	Fair Value of Collateral (1)
Unobservable input	[2]	Appraised Value (2) Sales Price	Appraised Value (2) Sales Price
SBA Servicing Assets [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value (in Dollars)		$ 4,319	$ 4,099
Valuation technique		Fair Value	Fair Value
Unobservable input	[3]	Individual Loan Valuation (3)	Individual Loan Valuation (3)
Minimum [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range		13.00%	0.00%
Weight average range		(13.00%)	(0.00%)
Minimum [Member] | Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range		7.00%	7.00%
Weight average range		(7.00%)	(7.00%)
Maximum [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range		86.00%	89.00%
Weight average range		(86.00%)	(89.00%)
Maximum [Member] | Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range		44.00%	39.00%
Weight average range		(44.00%)	(39.00%)
Weighted Average [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	[4]	32.00%	30.00%
Weight average range	[4]	(32.00%)	(30.00%)
Weighted Average [Member] | Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	[4]	11.00%	22.00%
Weight average range	[4]	(11.00%)	(22.00%)

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

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

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

[4] 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.