Note D - Operating Leases - Components of Lease Expense (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Operating lease expense	$ 1,229
Financing lease expense	5
Short Term lease expense	111
Total lease expense	$ 1,345
Weighted Average Remaining Lease Term (Years) - operating leases (Year)	9 years 2 months 23 days
Weighted Average Remaining Lease Term (Years) - financing leases (Year)	3 years 9 months 29 days
Weighted Average Discount Rate - operating leases	3.13%
Weighted Average Discount Rate - financing leases	5.00%
Operating cash flows from operating leases	$ 1,325
Operating cash flows from financing lease	8
Financing cash flows from financing lease	2
Right-of-use assets obtained in exchange for new operating lease liabilities	64
Right-of-use assets obtained in exchange for new finance lease liabilities	$ 124