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Note 6 - Long-term Debt (Details Textual) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 09, 2016
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval | $ 50,000 |  |
Dividends, Preferred Stock, Cash | 23,000 |  |
Long-term Debt, Total | 217,581,000 | $ 266,245,000 |
Pledged Assets Not Separately Reported, Fixed Assets | 567,300,000 |  |
Term Loan Payable to Farm Credit East ACA [Member] |  |  |
Debt Instrument, Face Amount |  |  | $ 100,000,000
Debt Instrument, Unamortized Discount, Total |  |  | $ 200,000
Tax-exempt Bond [Member] |  |  |
Long-term Debt, Total | 10,000,000 |  |
Term Loan [Member] |  |  |
Debt Agreements, Financial Covenants, Minimum EBITDA | 45,000,000 |  |
Long-term Debt, Total | $ 99,941,000 | $ 99,906,000 |

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- Definition The carrying amount, as of the date of the latest financial statement presented, of fixed assets owned but transferred to serve as collateral for the payment of the related debt obligation, primarily a secured borrowing or repurchase agreement, and for which the transferee is not permitted to sell or re-pledge them to an unrelated party. + References No definition available. + Details
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