Inventories - Schedule of Inventory, Current (Details) - USD ($) $ in Thousands	Apr. 02, 2021	Jan. 01, 2021
Inventory Disclosure [Abstract]
Raw materials and purchased parts	$ 3,534	$ 3,679
Work in process	2,272	2,174
Finished goods	12,440	13,717
Total inventories, gross	18,246	19,570
Less inventory reserves	(1,457)	(1,459)
Total inventories, net	$ 16,789	$ 18,111

The amount of FIFO (first in first out) inventory present at the reporting date when inventory is also valued using different valuation methods.

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount of valuation reserve for inventory.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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