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Inventories - Components of Inventories (Details) - USD ($)
$ in Thousands
Jul. 03, 2021
Jan. 02, 2021
Inventory Disclosure [Abstract]    
Raw materials $ 3,235 $ 2,236
Work in process 595 548
Finished goods 4,132 2,930
Total inventories $ 7,962 $ 5,714 [1]
[1] Derived from the audited consolidated financial statements included in the Annual Report on Form 10-K filed with the SEC for the year ended January 2, 2021.