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v3.25.1

Note 15 - Common Stock (Details Textual) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Apr. 30, 2025 USD ($) shares | Jan. 31, 2025 shares | Apr. 30, 2024 shares | Apr. 30, 2025 USD ($) $ / shares shares | Apr. 30, 2024 USD ($) $ / shares shares | Apr. 11, 2025 USD ($) | Jan. 11, 2018 | Aug. 15, 2008
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common Stock Dividends Percent of Increase from Class A to Class B | 110.00% |  |  | 110.00% |  |  |  |
Conversion of Stock From Class B to Class A Conversion Ratio |  |  |  | 1 |  |  |  |
Shareholder Ownership Percentage of Increase |  |  |  |  |  |  | 50.00% |
Minimum [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Shareholder Ownership Percentage |  |  |  |  |  |  | 5.00% |
Common Class A [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common Stock Voting Rights Votes per Share Number |  |  |  | 1 |  |  |  |
Shareholder Ownership Percentage |  |  |  |  |  |  |  | 4.90%
Number of Rights |  |  |  |  |  |  |  | 1
Shareholders Pre Existing Ownership Percentage |  |  |  |  |  |  | 5.00% |
Shareholders Current Ownership Percentage |  |  |  |  |  |  | 5.00% |
Shareholders Ownership Percentage on Transfers |  |  |  |  |  |  | 5.00% |
Shareholders Ownership Percentage Threshold |  |  |  |  |  |  | 5.00% |
Treasury Stock, Value, Acquired, Cost Method |  |  |  |  | $ 15.0 |  |  |
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) | $ / shares |  |  |  |  | $ 141.45 |  |  |
Stock Repurchase Program, Remaining Amount of Shares Authorized to be Repurchased | $ 26.4 |  |  | $ 26.4 |  |  |  |
Common Class A [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  | $ 30.6 |  |
Common Class B [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common Stock Voting Rights Votes per Share Number |  |  |  | 10 |  |  |  |
Common Stock Outstanding [Member] | Common Class A [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired (in shares) | shares | 126,448 | 131,460 | 106,047 | 257,908 | 106,047 |  |  |
Treasury Stock, Value, Acquired, Cost Method |  |  |  | $ 30.1 |  |  |  |
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) | $ / shares |  |  |  | $ 116.7 |  |  |  |

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