Note 3 - Derivative Instruments Measured at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Designated as Hedging Instrument [Member]
Derivative instruments included in prepaid and other current assets:
Notional Amount, Assets		$ 2,348
Fair Value, Assets		4
Notional Amount, Liability	$ 14,353	6,433
Fair Value, Liability	$ (306)	(220)
Not Designated as Hedging Instrument [Member]
Derivative instruments included in prepaid and other current assets:
Notional Amount, Assets		935
Fair Value, Assets		1
Notional Amount, Liability	$ 3,403	3,222
Fair Value, Liability	$ (76)	(114)
Notional Amount, Assets		3,283
Fair Value, Assets		5
Notional Amount, Liability	$ 17,756	9,655
Fair Value, Liability	$ (382)	$ (334)