Note 4 - Derivative Instruments and Hedging Activities (Details) (Forward Contracts [Member], USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Note 4 - Derivative Instruments and Hedging Activities (Details) [Line Items]
Derivative, Notional Amount	$ 22,800,000	$ 32,800,000	$ 22,800,000	$ 32,800,000
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net			100,000
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	(25,000)	36,000	(200,000)	(200,000)
Designated as Hedging Instrument [Member]
Note 4 - Derivative Instruments and Hedging Activities (Details) [Line Items]
Derivative, Notional Amount	19,000,000	25,500,000	19,000,000	25,500,000
Derivative, Loss on Derivative				400,000
Not Designated as Hedging Instrument [Member]
Note 4 - Derivative Instruments and Hedging Activities (Details) [Line Items]
Derivative, Notional Amount	3,800,000		3,800,000
Derivative, Loss on Derivative	$ 100,000	$ 200,000	$ 20,000