Note 6 - Derivative Instruments and Hedging Activities (Details) - Forward Contracts [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Note 6 - Derivative Instruments and Hedging Activities (Details) [Line Items]
Derivative, Notional Amount	$ 24.0	$ 13.5	$ 24.0	$ 13.5
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	(0.1)	(0.1)	(0.2)	(0.2)
Designated as Hedging Instrument [Member]
Note 6 - Derivative Instruments and Hedging Activities (Details) [Line Items]
Derivative, Notional Amount	20.4	10.5	20.4	10.5
Not Designated as Hedging Instrument [Member]
Note 6 - Derivative Instruments and Hedging Activities (Details) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ 0.1	$ 0.2	$ (0.1)	$ 0.1