Related Party - Topcon - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021
Related Party Transaction [Line Items]
Total revenues	$ 53,903	$ 36,347
Receivable from related party	3,106
Payable to related party	$ 627
Topcon America Corporation [Member]
Related Party Transaction [Line Items]
Ownership percentage	10.20%
Total revenues	$ 11,100
Purchases from related party	1,100
Receivable from related party	3,100
Payable to related party	600
Distribution Rights [Member]
Related Party Transaction [Line Items]
Revenue Recognized	600
Distribution Rights [Member] | Topcon America Corporation [Member]
Related Party Transaction [Line Items]
Revenue Recognized	$ 600