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Inventories, Net - Inventories, Net (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Inventory [Line Items]
Total raw materials	$ 3,361	$ 2,941
Total work-in-process	13,649	11,771
Total finished goods	4,808	3,636
Total inventories, net	21,818	18,348
Security Products
Inventory [Line Items]
Total raw materials	2,546	2,134
Total work-in-process	10,744	9,138
Total finished goods	3,385	2,582
Marine Components
Inventory [Line Items]
Total raw materials	815	807
Total work-in-process	2,905	2,633
Total finished goods	$ 1,423	$ 1,054

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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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 of unprocessed items to be consumed in the manufacturing or production process.

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Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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