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Note 14 - Preferred Stock (Details Textual) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jul. 12, 2005 | Apr. 30, 2025 | Apr. 30, 2024 | Apr. 30, 2025 | Apr. 30, 2024 | Oct. 31, 2024
Class of Stock [Line Items] |  |  |  |  |  |
Preferred Stock, Shares Issued, Total (in shares) |  | 5,600 |  | 5,600 |  | 5,600
Payments of Dividends |  | $ 2.7 | $ 2.7 | $ 5.3 | $ 5.3 |
Preferred Class A [Member] |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Preferred Stock, Shares Issued, Total (in shares) | 5,600 |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage | 7.625% |  |  |  |  |
Preferred Stock, Liquidation Preference Per Share (in dollars per share) | $ 25,000 |  |  |  |  |
Preferred Stock, Depositary Shares, Number of Shares of Preferred Stock in Each Depositary Share (in shares) | 0.001 |  |  |  |  |

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