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Note 6 - Long-Term Debt - Summary of Long-term Debt (Details) - USD ($)
Jun. 30, 2015
Dec. 31, 2014
Wells Fargo Revolving Loans [Member]    
Long-term Debt $ 30,843,000 $ 30,643,000
American Ag Credit Term Loan [Member]    
Long-term Debt 19,533,000 $ 19,533,000
First Hawaiian Bank Revolving Line of Credit [Member]    
Long-term Debt 400,000  
Long-term Debt $ 50,974,000 $ 50,176,000
Less current portion   2,533,000
Long-term debt $ 50,776,000 $ 47,643,000