Note 1 - Summary of Significant Accounting Policies - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 25, 2021
Property, plant and equipment	$ 143,336	$ 134,956
Less accumulated depreciation and amortization	(78,325)	(70,999)
Property, plant and equipment, net	65,011	63,957
Land and Land Improvements [Member]
Property, plant and equipment	7,066	7,703
Building and Building Improvements [Member]
Property, plant and equipment	31,161	31,711
Machinery and Equipment [Member]
Property, plant and equipment	$ 105,109	$ 95,542