Note 3 - Derivative Financial Instruments (Details) - Income Statement Locations (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Note 3 - Derivative Financial Instruments (Details) - Income Statement Locations [Line Items]
Operating expenses	$ 15,209	$ 10,837	$ 40,679	$ 31,830
Reclassification out of Accumulated Other Comprehensive Income [Member]
Note 3 - Derivative Financial Instruments (Details) - Income Statement Locations [Line Items]
Cost of sales	10	(104)	(89)	(122)
Operating expenses	$ 11	$ (94)	$ (83)	$ (110)