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Note 9 - Borrowings (Details Textual) $ in Millions	1 Months Ended		3 Months Ended	6 Months Ended
	Sep. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2009	Jun. 30, 2016 USD ($)	Dec. 31, 2015 USD ($)
Minimum [Member]
Federal Home Loan Bank, Advances, Maturity Period, Fixed Rate				1 day
Federal Home Loan Bank, Advances, Interest Rate				0.027%
Maximum [Member]
Federal Home Loan Bank, Advances, Maturity Period, Fixed Rate				5 years
Federal Home Loan Bank, Advances, Interest Rate				0.57%
Unsecured Debt [Member] | Trust [Member]
Subordinated Debt				$ 8.2
Notes Payable, Other Payables [Member]
Debt Instrument, Term	10 years
Debt Instrument, Interest Rate, Stated Percentage	1.75%
London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate				3.15%
Advances from Federal Home Loan Banks				$ 128.0	$ 132.0
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged				$ 131.3
Derivative, Variable Interest Rate				3.79%
Number of Consecutive Quarters for Interest Deferment			20
Interest Expense, Debt		$ 1.6
Interest Payable				$ 0.6
Proceeds from Notes Payable	$ 2.0

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