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Long-Term Debt (Details) (USD $) | 1 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2013 | Jan. 31, 2012 | Jun. 30, 2013 acre | Dec. 31, 2012
Long-Term Debt |  |  |  |
Long-term debt | $ 48,607,000 |  | $ 48,607,000 | $ 49,268,000
Less current portion | 48,607,000 |  | 48,607,000 | 4,068,000
Long-term debt |  |  |  | 45,200,000
Minimum |  |  |  |
Long-Term Debt |  |  |  |
Required liquidity under financial covenants | 4,000,000 |  | 4,000,000 |
Maximum |  |  |  |
Long-Term Debt |  |  |  |
Required total liabilities under financial covenants | 175,000,000 |  | 175,000,000 |
Wells Fargo revolving loans, 4.05% |  |  |  |
Long-Term Debt |  |  |  |
Long-term debt | 26,300,000 |  | 26,300,000 | 25,200,000
Interest rate (as a percent) | 4.05% |  | 4.05% | 4.05%
Maximum borrowing capacity | 32,700,000 |  | 32,700,000 |
Variable rate basis |  |  | LIBOR |
Interest rate margin (as a percent) | 3.80% |  | 3.80% |
Area of the company's real estate pledged as collateral (in acres) |  |  | 880 |
Commitment fees on the unused portion of the revolving facility |  |  | 0 |
Available borrowing capacity | 6,400,000 |  | 6,400,000 |
Wells Fargo revolving loans, 4.05% | Minimum |  |  |  |
Long-Term Debt |  |  |  |
Required liquidity under financial covenants | 3,000,000 |  | 3,000,000 |
Wells Fargo revolving loans, 4.05% | Maximum |  |  |  |
Long-Term Debt |  |  |  |
Required total liabilities under financial covenants | 175,000,000 |  | 175,000,000 |
American AgCredit term loan, 5.25% |  |  |  |
Long-Term Debt |  |  |  |
Long-term debt | 22,307,000 |  | 22,307,000 | 24,068,000
Interest rate (as a percent) | 5.25% |  | 5.25% | 5.25%
Variable rate basis |  |  | 30-day LIBOR |
Interest rate margin (as a percent) | 4.25% |  | 4.25% |
Area of the company's real estate pledged as collateral (in acres) |  |  | 3,100 |
Interest rate, variable interest rate floor (as a percent) |  |  | 1.00% |
Principal balance amount the Company is required to pay down to by December 31, 2013 | 20,000,000 |  | 20,000,000 |
Mandatory principal prepayment as percentage of the net proceeds of the sale of any real property pledged as collateral |  |  | 100.00% |
Repayment of principal | 1,800,000 | 353,000 | 1,800,000 |
American AgCredit term loan, 5.25% | Minimum |  |  |  |
Long-Term Debt |  |  |  |
Required liquidity under financial covenants | 4,000,000 |  | 4,000,000 |
Mandatory principal prepayment as percentage of the net proceeds of the sale of non collateralized real property |  |  | 10.00% |
American AgCredit term loan, 5.25% | Maximum |  |  |  |
Long-Term Debt |  |  |  |
Required total liabilities under financial covenants | $ 175,000,000 |  | $ 175,000,000 |
Applicable spread after tiered reduction (as a percent) | 0.0375 |  | 0.0375 |
Mandatory principal prepayment as percentage of the net proceeds of the sale of non collateralized real property |  |  | 75.00% |

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