Consolidated Balance Sheets (Parenthetical) $ in Thousands	Dec. 31, 2025 USD ($) Vote $ / shares shares	Dec. 31, 2024 USD ($) Vote $ / shares shares
Accounts receivable, allowance | $	$ 137	$ 130
Treasury stock, shares	12,378,224	11,649,110
Class B Common Stock [Member]
Common Stock, votes per share | Vote	10	10
Common Stock, par value | $ / shares	$ 0.01	$ 0.01
Common Stock, shares authorized	14,000,000	14,000,000
Common Stock, shares issued	11,726,718	11,738,718
Common Stock, shares outstanding	11,726,718	11,738,718
Common Stock [Member]
Common Stock, votes per share | Vote	1	1
Common Stock, par value | $ / shares	$ 0.01	$ 0.01
Common Stock, shares authorized	62,000,000	62,000,000
Common Stock, shares issued	45,910,601	45,082,156
Common Stock, shares outstanding	33,532,377	33,433,046