Note 8 - Non-accrual Loans (Details) - USD ($)	Jun. 30, 2016	Dec. 31, 2015
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans receivable	$ 0	$ 0
Loans receivable	3,060,000	3,433,000
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Loans receivable	0	0
Loans receivable	0	0
Commercial Portfolio Segment [Member] | Secured by Commercial Real Estate [Member]
Loans receivable	0	0
Loans receivable	3,399,000	3,627,000
Commercial Portfolio Segment [Member] | Secured by Residential Real Estate [Member]
Loans receivable	0	0
Loans receivable	1,735,000	1,803,000
State and Political Subdivisions Portfolio Segment [Member]
Loans receivable	0	0
Loans receivable	0	0
Finance Leases Portfolio Segment [Member]
Loans receivable	65,000	11,000
Loans receivable	110,000	143,000
Retail Portfolio Segment [Member] | Family Residential Mortgages [Member]
Loans receivable	0	0
Loans receivable	276,000	287,000
Retail Portfolio Segment [Member] | Home Equity Loan [Member]
Loans receivable	0	0
Loans receivable	105,000	127,000
Retail Portfolio Segment [Member] | Consumer Loans [Member]
Loans receivable	0	0
Loans receivable	0	0
Loans receivable	65,000	11,000
Loans receivable	$ 8,685,000	$ 9,420,000