Note J - Pension Liability - Components of Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Components of net periodic benefit cost:
Service cost and amortization of loss	$ 18	$ 19
Interest cost	12	10
Net periodic benefit cost	$ 30	$ 29