Note 4 - Long-Term Debt - Summary of Long-term Debt (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Wells Fargo Revolving Loans [Member]
Long-term Debt	$ 25,868,000	$ 30,643,000
American Ag Credit Term Loan [Member]
Long-term Debt	14,697,000	19,533,000
Long-term Debt	40,565,000	50,176,000
Less current portion	$ 40,565,000	2,533,000
Long-term debt		$ 47,643,000