Business Segments and Geographical Information - Schedule of Revenue Information by Product (Parenthetical) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019
Entity Wide Information Revenue From External Customer [Line Items]
Total revenues	$ 36,347	$ 43,447
Service Contract Revenues
Entity Wide Information Revenue From External Customer [Line Items]
Total revenues	$ 1,263	$ 1,363