Note 15 - Fair Values of Financial Instruments - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 25, 2021
Cash and cash equivalents	$ 3,967	$ 4,374
Current portion of long-term debt	7,143	7,143
Long-term debt	87,738	50,396
Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents	3,967	4,374
Current portion of long-term debt	0	0
Long-term debt	0	0
Fair Value, Inputs, Level 2 [Member]
Cash and cash equivalents	0	0
Current portion of long-term debt	7,143	7,143
Long-term debt	87,738	50,396
Fair Value, Inputs, Level 3 [Member]
Cash and cash equivalents	0	0
Current portion of long-term debt	0	0
Long-term debt	$ 0	$ 0