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Note 5 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Estimate of Fair Value Measurement [Member]
    
Note 5 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]    
Hedge derivative assets $ (221) $ 524
Fair Value, Inputs, Level 2 [Member]
    
Note 5 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]    
Hedge derivative assets $ (221) $ 524