Note K - Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 20, 2021	Mar. 21, 2020
Operating Lease Cost	$ 311	$ 207
Short-term Lease Cost	376	23
Variable Lease Cost	86	36
Total Operating Lease Cost	773	266
Operating Lease – Operating Cash Flows	255	187
New ROU Assets – Operating Leases (non-cash)	$ 827	$ 688
Weighted Average Remaining Lease Term – Operating Leases (in years) (Year)	1 year 10 months 24 days	2 years 7 months 9 days
Weighted Average Discount Rate – Operating Leases	5.00%	5.00%