Note 6 - Long-term Debt (Details Textual) | 3 Months Ended | |
Mar. 31, 2016USD ($)a | Dec. 31, 2015USD ($) |
Wells Fargo Revolving Loans [Member] | London Interbank Offered Rate (LIBOR) [Member] | | |
Debt Instrument, Basis Spread on Variable Rate | 3.65% | |
Wells Fargo Revolving Loans [Member] | Minimum [Member] | | |
Debt Instrument, Covenant Required Liquidity | $ 3,000,000 | |
Wells Fargo Revolving Loans [Member] | Maximum [Member] | | |
Debt Instrument Covenant Required Liabilities | 175,000,000 | |
Wells Fargo Revolving Loans [Member] | | |
Line of Credit Facility, Commitment Fee Amount | 0 | |
Line of Credit Facility, Maximum Borrowing Capacity | 25,900,000 | |
Long-term Debt | 25,868,000 | $ 25,868,000 |
Debt Instrument, Interest Rate, Stated Percentage | | 4.00% |
First Hawaiian Bank Revolving Line of Credit [Member] | Minimum [Member] | | |
Debt Instrument, Covenant Required Liquidity | 3,000,000 | |
First Hawaiian Bank Revolving Line of Credit [Member] | Maximum [Member] | | |
Debt Instrument Covenant Required Liabilities | 175,000,000 | |
First Hawaiian Bank Revolving Line of Credit [Member] | | |
Line of Credit Facility, Commitment Fee Amount | 0 | |
Line of Credit Facility, Maximum Borrowing Capacity | $ 3,500,000 | |
American Ag Credit Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member] | Interest Paid Monthly [Member] | | |
Debt Instrument, Basis Spread on Variable Rate | 5.25% | |
American Ag Credit Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member] | | |
Debt Instrument, Basis Spread on Variable Rate | 6.75% | |
American Ag Credit Term Loan [Member] | Minimum [Member] | | |
Debt Instrument, Covenant Required Liquidity | $ 3,000,000 | |
American Ag Credit Term Loan [Member] | Maximum [Member] | | |
Debt Instrument Covenant Required Liabilities | $ 175,000,000 | |
Debt Instrument, Mandatory Principal Repayments as Percentage Net Proceeds of Sale of Non Collateralized Real Property | 75.00% | |
American Ag Credit Term Loan [Member] | Maximum Balance for a 1.25% Decrease [Member] | | |
Debt Instrument, Interest Rate, Increase (Decrease) | (1.25%) | |
Debt Instrument, Maximum Amount of Principal Balance Triggering Reduction in Interest Rate | $ 10,000,000 | |
American Ag Credit Term Loan [Member] | Maximum Balance for an Additional 1.25% Decrease [Member] | | |
Debt Instrument, Interest Rate, Increase (Decrease) | (1.25%) | |
Debt Instrument, Maximum Amount of Principal Balance Triggering Reduction in Interest Rate | $ 5,000,000 | |
American Ag Credit Term Loan [Member] | Interest Paid Monthly [Member] | | |
Debt Instrument, Interest Rate, Stated Percentage | 5.50% | |
American Ag Credit Term Loan [Member] | | |
Long-term Debt | $ 14,697,000 | $ 14,697,000 |
Debt Instrument, Interest Rate, Stated Percentage | 7.00% | 7.00% |
Pledged Assets not Separately Reported Area of Real Estate | a | 3,700 | |
Debt Instrument, Mandatory Principal Repayments as Percentage Net Proceeds of Sale of Real Estate Property Pledged as Collateral | 100.00% | |
Minimum [Member] | | |
Debt Instrument, Covenant Required Liquidity | $ 3,000,000 | |
Maximum [Member] | | |
Debt Instrument, Covenant Required Liquidity | 175,000,000 | |
Long-term Debt | $ 40,565,000 | $ 40,565,000 |