Business Segments - Revenue Information by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues	$ 11,761	$ 13,706
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues	5,321	6,774
Europe, Middle East and Africa
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues	3,698	4,177
Asia/Pacific Rim
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues	2,444	2,143
Americas, excluding the U.S.
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues	$ 298	$ 612