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Note D - Leases - Components of Lease Expense (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Operating lease expense $ 1,230 $ 1,206  
Financing lease expense 32 32  
Short Term lease expense 19 130  
Total lease expense $ 1,281 $ 1,368  
Weighted Average Remaining Lease Term (Years) - operating leases (Year) 7 years 1 month 24 days 8 years 1 month 2 days  
Weighted Average Remaining Lease Term (Years) - financing leases (Year) 1 year 9 months 29 days 2 years 9 months 29 days  
Weighted Average Discount Rate - operating leases 3.22% 3.23%  
Weighted Average Discount Rate - financing leases 5.00% 5.00%  
Operating cash flows from operating leases $ 1,287 $ 1,351  
Operating cash flows from financing lease 5 5  
Financing cash flows from financing lease 18 17 $ 2
Right-of-use assets obtained in exchange for new operating lease liabilities $ 124 $ 712