Note 15 - Common Stock (Details Textual) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended
	Feb. 27, 2026 USD ($)	Jan. 31, 2026 USD ($) Item $ / shares shares	Jan. 31, 2025 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%
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		$ 9,000	$ 18,050
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 | Item		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%
Share Repurchase Program, Remaining Authorized, Amount		$ 17,400
Stock Repurchase Program, Authorized Amount				$ 30,600
Stock Repurchase Program, Authorized Amount Incremental Increase	$ 50,000
Common Class A [Member] | Subsequent Event [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount	$ 67,400
Common Class B [Member]
Class of Stock [Line Items]
Common Stock Voting Rights Votes per Share Number | Item		10
Common Stock Outstanding [Member] | Common Class A [Member]
Class of Stock [Line Items]
Treasury Stock, Shares, Acquired (in shares) | shares		85,398	131,460
Treasury Stock, Value, Acquired, Cost Method		$ 9,000	$ 17,900
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) | $ / shares		$ 105.39	$ 135.95