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Capital Stock (Details Narrative) - $ / shares
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Class of Stock [Line Items]    
Preferred stock, par value $ 1.00 $ 1.00
Preferred stock, shares authorized 5,000,000 5,000,000
Common stock voting rights Class C shares have 10 votes per share on all matters except for the election of one third of the directors who are elected solely by the Class A shares.  
Stockholders dividends descriptions Stockholders of both Class A and Class C Common Stock have received 5% stock dividends in the years 1990 through 2019, a 7.5% stock dividend in the year 2020, and a 5% stock dividend in the years 2021 through 2024, as authorized by the Company’s Board of Directors.  
Share-Based Payment Arrangement, Option [Member]    
Class of Stock [Line Items]    
Antidilutive securities excluded from computation of earnings per share, amount 363,700
Common Class B [Member]    
Class of Stock [Line Items]    
Common stock, par value $ 1.00 $ 1.00
Common stock, shares authorized 5,000,000 5,000,000
Common stock, shares, issued 0 0