Note 5 - Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
Fair Value of Derivatives	[1]	$ (2,344)	$ (4,293)
Fair Value, Inputs, Level 1 [Member]
Fair Value of Derivatives
Fair Value, Inputs, Level 2 [Member]
Fair Value of Derivatives		(2,344)	(4,293)
Fair Value, Inputs, Level 3 [Member]
Fair Value of Derivatives

[1] Includes derivative assets of $46 at June 30, 2017 and $26 at December 31, 2016.