Note 6 - Fair Value of Financial Instruments (Details) - Estimated Fair Value of Company's Financial Instruments (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Financial assets:
Cash and cash equivalents	$ 81,202,000	$ 120,686,000	$ 29,933,000	$ 83,660,000
Securities available for sale	127,247,000	107,956,000
Loans held for sale	3,861,000	1,502,000
Loans receivable, net	367,667,000	384,615,000
Federal Home Loan Bank stock	777,000	784,000
Accrued interest receivable	1,742,000	1,953,000
Financial liabilities:
Deposits	522,853,000	553,930,000
Accrued interest payable	103,000	146,000
Commitments to extend credit	28,000	2,000
Commitments to extend credit	127,802,000	126,871,000
Commitments to sell loans	(100,000)	(22,000)
Commitments to sell loans	5,932,000	2,025,000
Fair Value, Inputs, Level 1 [Member]
Financial assets:
Cash and cash equivalents	81,202,000	120,686,000
Fair Value, Inputs, Level 2 [Member]
Financial assets:
Securities available for sale	127,247,000	107,956,000
Loans held for sale	3,861,000	1,502,000
Loans receivable, net	367,403,000	388,263,000
Federal Home Loan Bank stock	777,000	784,000
Accrued interest receivable	1,742,000	1,953,000
Financial liabilities:
Deposits	522,853,000	553,930,000
Accrued interest payable	103,000	146,000
Estimate of Fair Value Measurement [Member]
Financial assets:
Cash and cash equivalents	81,202,000	120,686,000
Securities available for sale	127,247,000	107,956,000
Loans held for sale	3,861,000	1,502,000
Loans receivable, net	367,403,000	388,263,000
Federal Home Loan Bank stock	777,000	784,000
Accrued interest receivable	1,742,000	1,953,000
Financial liabilities:
Deposits	522,853,000	553,930,000
Accrued interest payable	103,000	146,000
Commitments to extend credit	28,000	2,000
Commitments to sell loans	$ (100,000)	$ (22,000)