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Note 5 - Derivative Financial Instruments (Details) (USD $)	6 Months Ended
	Jun. 30, 2014 gal
Note 5 - Derivative Financial Instruments (Details) [Line Items]
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax (in Dollars)	$ 58,000
Price Risk Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net (in Dollars)	$ 30,000
Derivative, Nonmonetary Notional Amount, Gallons	600,000
Minimum [Member]
Note 5 - Derivative Financial Instruments (Details) [Line Items]
Derivative, Nonmonetary, Number of Gallons Range	10,000
Underlying, Derivative Volume (in Dollars per US Gallon)	2.75
Maximum [Member]
Note 5 - Derivative Financial Instruments (Details) [Line Items]
Derivative, Nonmonetary, Number of Gallons Range	50,000
Underlying, Derivative Volume (in Dollars per US Gallon)	2.88

Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

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