Note 10 - Hedging Activities (Details) - USD ($)	1 Months Ended
	Feb. 29, 2012	Jun. 30, 2015	Dec. 31, 2014
Note 10 - Hedging Activities (Details) [Line Items]
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust	$ 32,000,000	$ 54,813,000	$ 54,472,000
Fair Value of Interest Rate Swap Agreement Liability		$ 400,000	$ 300,000
London Interbank Offered Rate (LIBOR) [Member] | Junior Subordinated Debt [Member]
Note 10 - Hedging Activities (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.18%
Derivative, Notional Amount	$ 32,000,000