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Inventories - Components of Inventories (Details) - USD ($)
$ in Thousands
Apr. 03, 2021
Jan. 02, 2021
Inventory Disclosure [Abstract]    
Raw materials $ 3,827 $ 2,236
Work in process 534 548
Finished goods 2,681 2,930
Total inventories $ 7,042 $ 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.