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Note 21 - Subsequent Events (Details Textual) - Subsequent Event [Member] - USD ($)
$ in Millions
Feb. 29, 2024
Jan. 31, 2024
Stock Repurchase Program, Authorized Amount $ 25.0  
Glen Rock, Pennsylvania Property [Member]    
Real Estate, Held-for-Sale   $ 0.8
Common Class A [Member]    
Stock Repurchase Program, Authorized Amount 4.0  
Common Class B [Member]    
Stock Repurchase Program, Authorized Amount $ 21.0