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Inventories - Summary of Inventories (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Inventory, Net [Abstract]
Raw materials	$ 13,405	$ 14,262
Work in process	5,147	5,594
Finished goods	674	496
Obsolescence allowance	(2,174)	(3,009)
Total inventories	$ 17,052	$ 17,343

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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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