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Inventories, net - Summary of Inventories, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Inventories, net
Component parts	$ 5,439	$ 7,429
Work-in-process and finished goods	7,654	12,390
Total	$ 13,093	$ 19,819

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The aggregated amount of merchandise or goods held by the entity and readily available for future sale plus items held by the entity which are partially complete or in the process of being readied for future sale. This amount is net of valuation reserves and adjustments.

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

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date for elements of machinery or equipment held for the purpose of replacing similar parts in the course of repair or maintenance.

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