Note 6 - Fair Value of Financial Instruments (Details) - Estimated Fair Value of Company's Financial Instruments (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 57,652,000	$ 83,660,000	$ 76,400,000	$ 67,840,000
Securities available for sale	89,687,000	85,891,000
Loans held for sale	1,180,000	2,584,000
Loans receivable, net	393,322,000	454,045,000
Accrued interest receivable	1,817,000	2,018,000
Deposits	485,921,000	514,951,000
Federal Home Loan Bank advances	0	70,000,000
Accrued interest payable	127,000	247,000
Commitments to extend credit	22,000	27,000
Commitments to sell loans	(46,000)	(40,000)
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	57,652,000	83,660,000
Securities available for sale	89,687,000	85,891,000
Loans held for sale	1,180,000	2,584,000
Loans receivable, net	397,827,000	459,177,000
Accrued interest receivable	1,817,000	2,018,000
Deposits	485,921,000	514,951,000
Federal Home Loan Bank advances	0	71,623,000
Accrued interest payable	127,000	247,000
Commitments to extend credit	22,000	27,000
Commitments to sell loans	(46,000)	(40,000)
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	57,652,000	83,660,000
Securities available for sale	0	81,000
Loans held for sale	0	0
Loans receivable, net	0	0
Accrued interest receivable	0	0
Deposits	0	0
Federal Home Loan Bank advances	0	0
Accrued interest payable	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Securities available for sale	89,687,000	85,810,000
Loans held for sale	1,180,000	2,584,000
Loans receivable, net	397,827,000	459,177,000
Accrued interest receivable	1,817,000	2,018,000
Deposits	485,921,000	514,951,000
Federal Home Loan Bank advances	0	71,623,000
Accrued interest payable	127,000	247,000
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Securities available for sale	0	0
Loans held for sale	0	0
Loans receivable, net	0	0
Accrued interest receivable	0	0
Deposits	0	0
Federal Home Loan Bank advances	0	0
Accrued interest payable	0	0
Contract Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commitments to extend credit	119,398,000	84,877,000
Commitments to sell loans	$ 2,533,000	$ 7,046,000