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Note K - Subsequent Events (Details Textual) - USD ($)
3 Months Ended
Jan. 26, 2026
Sep. 30, 2025
Mar. 31, 2025
Mar. 31, 2026
Common Stock, Dividends, Per Share, Declared (in USD per Share)   $ 0.6 $ 0.6  
O 2026 Q1 Dividends [Member] | Subsequent Event [Member]        
Common Stock, Dividends, Per Share, Declared (in USD per Share) $ 0.25      
Forecast [Member] | Settlement With Manufacturer [Member]        
Gain Contingency, Unrecorded Amount       $ 300,000