Note 14 - Financial Derivatives (Details) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Positive Fair Value Member
Note 14 - Financial Derivatives (Details) [Line Items]
Notional Amount Of Option Contract	$ 510,000	$ 209,000
Open Option Contracts Written, at Fair Value	55,000	2,000
Sum of Spot and Forward Contract Notional Amount	210,700,000	188,100,000
Increase Decrease in Fair Value	3,200,000	2,900,000
Negative Fair Value Member
Note 14 - Financial Derivatives (Details) [Line Items]
Sum of Spot and Forward Contract Notional Amount	233,100,000	133,700,000
Increase Decrease in Fair Value	$ 6,200,000	$ 1,600,000