Note 6 - Long-term Debt - Summary of Long-term Debt (Details) (Parentheticals)	Sep. 30, 2016	Dec. 31, 2015
First Hawaiian Bank Revolving Line of Credit [Member]
Debt Instrument, Interest Rate, Stated Percentage	4.38%
Wells Fargo Revolving Loans [Member]
Debt Instrument, Interest Rate, Stated Percentage		4.00%
American Ag Credit Term Loan [Member]
Debt Instrument, Interest Rate, Stated Percentage		7.00%