Note N - Lease Liabilities - Future Minimum Rental Commitments Under Noncancellable Leases (Details) $ in Thousands	Dec. 27, 2019 USD ($)
2020, Operating Leases	$ 1,553
2020, Finance Leases	103
2021, Operating Leases	2,598
2021, Finance Leases	206
2022, Operating Leases	2,096
2022, Finance Leases	206
2023, Operating Leases	1,965
2023, Finance Leases	198
2024, Operating Leases	1,792
2024, Finance Leases	166
Thereafter, Operating Leases	12,455
Thereafter, Finance Leases	8
Total future lease payments, Operating Leases	22,459
Total future lease payments, Finance Leases	887
Less: Amount representing interest, Operating Leases	(7,270)
Less: Amount representing interest, Finance Leases	(123)
Present value of future payments, Operating Leases	15,189
Present value of future payments, Finance Leases	$ 764