Note 3 - Loans Receivable and Allowance for Loan Losses (Details) - Delinquency Status of Non-Accrual Loans and Past Due Matured Loans - USD ($)	Sep. 30, 2015	Dec. 31, 2014
Commercial Real Estate
Non accrual loans	$ 383,000	$ 866,000
Substandard [Member]
Commercial Real Estate
Non accrual loans	383,000	866,000
Non-Accrual Loans [Member]
Commercial Real Estate
Non accrual loans past due	383,000	728,000
Non accrual loans current	383,000	138,000
Non-Accrual Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Commercial Real Estate
Non accrual loans past due	383,000	728,000
Commercial Real Estate Portfolio Segment [Member]
Commercial Real Estate
Non accrual loans		138,000
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Commercial Real Estate
Non accrual loans		138,000
Commercial Real Estate Portfolio Segment [Member] | Non-Accrual Loans [Member]
Commercial Real Estate
Non accrual loans current		138,000
Commercial Real Estate Portfolio Segment [Member] | Non-Accrual Loans [Member] | Substandard [Member]
Commercial Real Estate
Non accrual loans current		138,000
Residential Portfolio Segment [Member]
Commercial Real Estate
Non accrual loans	380,000	719,000
Residential Portfolio Segment [Member] | Substandard [Member]
Commercial Real Estate
Non accrual loans	380,000	719,000
Residential Portfolio Segment [Member] | Non-Accrual Loans [Member]
Commercial Real Estate
Non accrual loans past due	380,000	719,000
Non accrual loans current	380,000
Residential Portfolio Segment [Member] | Non-Accrual Loans [Member] | Substandard [Member]
Commercial Real Estate
Non accrual loans past due	380,000	719,000
Residential Portfolio Segment [Member] | Non-Accrual Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Commercial Real Estate
Non accrual loans past due	380,000	719,000
Residential Portfolio Segment [Member] | Non-Accrual Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Substandard [Member]
Commercial Real Estate
Non accrual loans past due	380,000	719,000
Consumer Portfolio Segment [Member]
Commercial Real Estate
Non accrual loans	3,000	7,000
Consumer Portfolio Segment [Member] | Substandard [Member]
Commercial Real Estate
Non accrual loans	3,000	7,000
Consumer Portfolio Segment [Member] | Non-Accrual Loans [Member]
Commercial Real Estate
Non accrual loans past due	3,000	7,000
Non accrual loans current	3,000
Consumer Portfolio Segment [Member] | Non-Accrual Loans [Member] | Substandard [Member]
Commercial Real Estate
Non accrual loans past due	3,000	7,000
Consumer Portfolio Segment [Member] | Non-Accrual Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Commercial Real Estate
Non accrual loans past due	3,000	7,000
Consumer Portfolio Segment [Member] | Non-Accrual Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Substandard [Member]
Commercial Real Estate
Non accrual loans past due	$ 3,000	7,000
Consumer Portfolio Segment [Member] | Non-Accrual and Past Due Loans [Member]
Commercial Real Estate
Non accrual loans		7,000
Commercial Portfolio Segment [Member]
Commercial Real Estate
Non accrual loans		2,000
Commercial Portfolio Segment [Member] | Substandard [Member]
Commercial Real Estate
Non accrual loans		2,000
Commercial Portfolio Segment [Member] | Non-Accrual Loans [Member]
Commercial Real Estate
Non accrual loans past due		2,000
Commercial Portfolio Segment [Member] | Non-Accrual Loans [Member] | Substandard [Member]
Commercial Real Estate
Non accrual loans past due		2,000
Commercial Portfolio Segment [Member] | Non-Accrual Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Commercial Real Estate
Non accrual loans past due		2,000
Commercial Portfolio Segment [Member] | Non-Accrual Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Substandard [Member]
Commercial Real Estate
Non accrual loans past due		$ 2,000