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Note 14 - Subsequent Events (Details Textual) | Feb. 08, 2016 USD ($) a | Dec. 22, 2016 USD ($) | Sep. 01, 2016 USD ($) | Jun. 01, 2016 USD ($) | Mar. 04, 2016 | Feb. 25, 2016 USD ($) | Dec. 31, 2015 a | Nov. 30, 2015 USD ($)
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Fenner Valley Farms LLC [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |
Lessor Leasing Arrangements, Operating Leases, Term of Contract | 99 years |  |  |  |  |  |  |
Area of Land | a | 2,100 |  |  |  |  |  |  |
Proceeds from Leases Held-for-investment | $ 12,000,000 |  |  |  |  |  |  |
Additional Acres Available for Lease Maximum | 7,500 |  |  |  |  |  |  |
Additional Acres Available for Lease Tranche 1 |  |  |  | $ 2,093 |  |  |  |
Additional Acres Available for Lease Value Tranche 1 |  |  |  | $ 12,000,000 |  |  |  |
Additional Acres Available for Lease Tranche 2 |  |  | $ 2,093 |  |  |  |  |
Additional Acres Available for Leases Value Tranche 2 |  |  | $ 12,000,000 |  |  |  |  |
Additional Acres Available for Lease Tranche 3 |  | $ 3,314 |  |  |  |  |  |
Additional Acres Available for Leases Value Tranche 3 |  | $ 19,000,000 |  |  |  |  |  |
Subsequent Event [Member] | Senior Secured Debt [Member] |  |  |  |  |  |  |  |
Repayments of Senior Debt | $ 10,500,000 |  |  |  |  |  |  |
Percentage of Future Quarterly Interest Payments | 50.00% |  |  |  |  |  |  |
Debt Instrument, Fee Amount |  |  |  |  |  | $ 2,250,000 |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 8.00% |  |  |
Senior Secured Debt [Member] |  |  |  |  |  |  |  |
Debt Instrument, Fee Amount |  |  |  |  |  |  |  | $ 2,250,000
Area of Land | a |  |  |  |  |  |  | 45,000 |
Percentage of Future Quarterly Interest Payments |  |  |  |  |  |  | 50.00% |

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