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Note 15 - Common Stock (Details Textual) $ / shares in Units, $ in Millions	3 Months Ended
	Jan. 31, 2025 USD ($) $ / shares shares	Jan. 31, 2024 shares	Dec. 18, 2024 USD ($)	Oct. 31, 2024 USD ($)	Sep. 01, 2022 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%
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 Acquired, Average Cost Per Share (in dollars per share) | $ / shares	$ 135.95
Stock Repurchase Program, Remaining Amount of Shares Authorized to be Repurchased	$ 8.6
Share Repurchase Program, Remaining Authorized, Amount				$ 6.5
Common Class A [Member] | Maximum [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount			$ 26.5		$ 50.0
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	131,460	0
Treasury Stock, Value, Acquired, Cost Method	$ 17.9

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Percentage of the corresponding regular cash dividend payable on a share of Class A Common Stock to the amount of any regular cash dividend payable on a share of Classs B Common Stock

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