Note J - Leases - Maturities of lease Liabilities (Details) $ in Thousands	Mar. 31, 2019 USD ($)
2019 (excluding the three months ended March 31, 2019)	$ 191
2019 (excluding the three months ended March 31, 2019)	428
2020	251
2020	499
2021	163
2021	449
2022	11
2022	461
2023
2023	472
Thereafter
Thereafter	903
Total lease payments	616
Total lease payments	3,212
Less: future interest expense	(57)
Less: future interest expense	(675)
Lease liabilities	559
Operating Lease, Liability, Total	$ 2,537