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Note 15 - Common Stock (Details Textual) $ / shares in Units, $ in Millions	3 Months Ended			9 Months Ended
	Jul. 31, 2023 USD ($) shares	Jan. 31, 2023 USD ($)	Jul. 31, 2022 shares	Jul. 31, 2023 USD ($) $ / shares shares	Jul. 31, 2022 shares	Sep. 01, 2022 USD ($)	Jan. 11, 2018	Aug. 15, 2008
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%
Treasury Stock, Value, Acquired, Cost Method		$ 4.8
Minimum [Member]
Shareholder Ownership Percentage							5.00%
Common Class A [Member]
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%
Stock Repurchase Program, Authorized Amount						$ 50.0
Treasury Stock, Shares, Acquired (in shares) | shares	0		0	118,478	0
Treasury Stock, Value, Acquired, Cost Method				$ 4.8
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) | $ / shares				$ 40.51
Stock Repurchase Program, Remaining Amount of Shares Authorized to be Repurchased	$ 33.0			$ 33.0
Common Class B [Member]
Common Stock Voting Rights Votes per Share Number	10

X

- Definition

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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Represent the number of votes per share of common stock

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Represents the ratio at which Class B stock must be converted to Class A stock, should such conversion occur.

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Number of rights which, under the company's shareholder rights plan, was distributed for each share of Class A Common Stock and Class B Common Stock outstanding at the close of business on August 15, 2008.

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Percentage of ownership of shareholders for which if they increased their collevtive ownership of the aggregate amount of our outstanding shares by more than 50 percentage points over a defined period of time, under Section 382 of the Internal Revenue Code, would limit our ability to use NOLs and built-in losses if there was an "ownership change".

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Percentage of increase over a defined period of time of percentage of collective ownership of shareholders of 5% or more, which under Section 382 of the Internal Revenue Code would limit our ability to use NOLs and built-in losses if there was an "ownership change".

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Percentage of common stock ownership of which current stockholders exceed, per the company's Certificate of Incorporation would trigger a restriction of any direct or indirect transfer if the effect of the transaction would be to increase the direct or indirect ownership of the company's stock by any person or public group over this percentage.

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Percentage of common stock ownership which, per the company's Certificate of Incorporation would trigger a restriction of any direct or indirect transfer if the effect of the transaction would be to increase the direct or indirect ownership of the company's stock by any person or public group over this percentage.

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Threshold of percentage of ownership of common stock under the company's amended Certificate of Incorporation.

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Percentage of Class A Common Stock owned by stockholders prior to the amendment of the Company's Certificate of Incorporation.

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Represents remaining amount of shares authorized to repurchased for stock repurchase program.

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Amount of stock repurchase plan authorized.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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