Note 7 - Fair Value of Financial Instruments (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Note 7 - Fair Value of Financial Instruments (Details) [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 0		$ 0
Impaired Financing Receivable, Unpaid Principal Balance	7,000,000		7,000,000		$ 2,582,000
Impaired Financing Receivable, Related Allowance	446,000		446,000		60,000
Allowance for Loan and Lease Losses, Period Increase (Decrease)	$ 0	$ 1,000	$ 6,000	$ 39,000
Number of Loan Portfolio Segments			3
Term of Maturity for Short-term Borrowings			90 days
Fair Value, Measurements, Nonrecurring [Member]
Note 7 - Fair Value of Financial Instruments (Details) [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance					179,000
Impaired Financing Receivable, Related Allowance					$ 6,000