Note 9 - Derivative Instruments and Hedging Activities (Details Textual) - USD ($) $ in Thousands		1 Months Ended
	Mar. 31, 2015	Feb. 28, 2014	Mar. 31, 2017	Dec. 31, 2016
Derivative, Notional Amount			$ 4,762	$ 4,835
Interest Rate Swap [Member]
Derivative, Term of Contract	14 years	15 years
Derivative, Notional Amount	$ 1,200	$ 4,370