Business Segments - Schedule of Revenue Information by Product (Parenthetical) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2021	Sep. 26, 2020	Oct. 02, 2021	Sep. 26, 2020
Entity Wide Information Revenue From External Customer [Line Items]
Total revenues	$ 13,264	$ 8,803	$ 38,649	$ 24,043
Distribution Rights [Member]
Entity Wide Information Revenue From External Customer [Line Items]
Revenue Recognized	200		300
Service Contract Revenues
Entity Wide Information Revenue From External Customer [Line Items]
Total revenues	387	$ 1,061	302	$ 929
Service Contract Revenues | Distribution Rights [Member]
Entity Wide Information Revenue From External Customer [Line Items]
Revenue Recognized	$ 228		$ 339