Note D - Fair Values of Financial Instruments - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Jul. 09, 2022	Dec. 25, 2021	Jul. 10, 2021
Cash and cash equivalents	$ 6,195	$ 4,374	$ 10,641
Current portion of long-term debt	7,143	7,143	7,143
Long-term debt	94,040	50,396	42,857
Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents	6,195	4,374	10,641
Fair Value, Inputs, Level 2 [Member]
Current portion of long-term debt	7,143	7,143	7,143
Long-term debt	$ 94,040	$ 50,396	$ 42,857