Note M - Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Long-term	$ 140	$ 67	$ 412	$ 106
Short-term	527	563	1,671	1,649
Total	$ 667	$ 630	$ 2,083	$ 1,755