Revenue from Contracts with Customers - Contract Liability (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Movement In Contract With Customer, Liability, Net [Roll Forward]
Beginning balance	$ 1,614	$ 0
Accruals for estimated future stock rotation and scrap returns	5,763	4,281
Less: Release of accruals for recognized stock rotation and scrap returns	(5,064)	(2,667)
Ending balance	2,313	1,614
Processing of RMAs	5,000	3,700
Net revenue increase (decrease)	$ 100	$ (1,000)