Note K - Leases - Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating cash flows from finance leases	$ 19	$ 31
Financing cash flows from finance leases	168	157
Operating cash flows from operating leases	334	326
Operating cash flows from short-term leases	160	173
Operating cash flows from variable lease costs	41	35
Finance leases		737
Operating leases	$ 20	$ 1,852