Inventories - Schedule of Inventory, Current (Details) - USD ($) $ in Thousands	Apr. 01, 2022	Dec. 31, 2021
Inventory Disclosure [Abstract]
Raw materials and purchased parts	$ 4,480	$ 3,971
Work in process	3,599	4,031
Finished goods	11,538	10,429
Total inventories, gross	19,617	18,431
Less inventory reserves	(1,167)	(1,157)
Total inventories, net	$ 18,450	$ 17,274

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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