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Note 7 - Long-term Debt (Details Textual) - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Feb. 02, 2023 | Jan. 30, 2023 | Jul. 02, 2021 | Jul. 01, 2021 | Jun. 29, 2021 | Dec. 31, 2022 | Dec. 31, 2021
Preferred Stock, Dividend Rate, Percentage |  |  |  |  |  | 8.857% | 8.857%
Deposits, Segregated Account, Pre-fund Eight Quarterly Dividend Payments |  |  | $ 10,200 |  |  |  |
Debt Instrument, Unamortized Discount, Total |  |  |  |  |  | $ 1,198 | $ 3,587
Warrants Issued to Lenders [Member] |  |  |  |  |  |  |
Class of Warrant or Right, Issued During Period (in shares) |  |  | 2 |  |  |  |
Warrants and Rights Outstanding |  |  |  |  |  | $ 1,900 |
A Warrant [Member] |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) |  |  | 500,000 |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  | $ 17.38 |  |  |  |
Percentage of Closing Price Per Share of Common Stock |  |  | 120.00% |  |  |  |
B Warrant [Member] |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) |  |  | 500,000 |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  | $ 21.72 |  |  |  |
Percentage of Closing Price Per Share of Common Stock |  |  | 150.00% |  |  |  |
Warrants and Rights Outstanding, Term (Day) |  |  | 180 days |  |  |  |
Series A Preferred Stock [Member] |  |  |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  |  | 8.875% | 8.875% | 8.875% | 8.875% | 8.875%
Preferred Stock, Liquidation Preference Per Share (in dollars per share) |  |  |  |  | $ 25,000.00 |  |
Depository Shares [Member] |  |  |  |  |  |  |
Preferred Stock, Liquidation Preference Per Share (in dollars per share) |  |  | $ 25.00 | $ 25.00 | $ 25.00 |  |
New Loan [Member] |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  | $ 50,000 |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 7.00% |  |  |  |
Debt Instrument, Unamortized Discount, Total |  |  | $ 2,900 |  |  |  |
New Loan [Member] | Subsequent Event [Member] |  |  |  |  |  |  |
Repayments of Debt | $ 15,000 | $ 15,000 |  |  |  |  |
New Loan [Member] | Repayment After Eighteen-months of the Closing Date [Member] |  |  |  |  |  |  |
Debt Instrument, Repayment Fee Percentage |  |  | 4.00% |  |  |  |
New Loan [Member] | Repayment After Thirty-months of the Closing Date [Member] |  |  |  |  |  |  |
Debt Instrument, Repayment Fee Percentage |  |  | 6.00% |  |  |  |
New Loan [Member] | Issuance After One Year of the Closing Date [Member] |  |  |  |  |  |  |
Debt Instrument, Prepay Amount, Percentage of the Cash Proceeds Received |  |  | 75.00% |  |  |  |
New Loan [Member] | Between 18-months and 24-months Anniversary of the Closing of the Debt [Member] |  |  |  |  |  |  |
Debt Instrument, Percentage of Principal Exchanged into Depositary Receipts |  |  | 75.00% |  |  |  |
New Loan [Member] | After 24-months Anniversary of the Closing of the Debt [Member] |  |  |  |  |  |  |
Debt Instrument, Percentage of Principal Exchanged into Depositary Receipts |  |  | 100.00% |  |  |  |
Apollo [Member] |  |  |  |  |  |  |
Stock Issued During Period, Shares Debt Reassignment Fee (in shares) |  |  | 299,210 |  |  |  |
Affiliate of BRS [Member] | Senior Secured Debt Issued By Cadiz [Member] |  |  |  |  |  |  |
Payments to Acquire Notes Receivable |  |  | $ 77,600 |  |  |  |

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