Business Segments and Geographical Information - Revenue Information by Geographic Region (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues	$ 56,972	$ 53,903
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues	29,179	24,946
Europe, Middle East and Africa
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues	13,801	13,970
Americas, excluding the U.S.
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues	3,061	2,543
Asia/Pacific Rim
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues	$ 10,931	$ 12,444