Note C - Accrued Liabilities (Details Textual) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Employee-related Liabilities	$ 9,761,000	$ 7,631,000
Contract with Customer, Liability, Current	7,345,000	13,666,000
Loss Contingency Accrual, Product Liability, Gross	4,982,000	5,065,000
Taxes Payable, Current	361,000	330,000
Accrual for Environmental Loss Contingencies	925,000	900,000
Other Accrued Liabilities, Current	$ 1,192,000	$ 2,441,000