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Summary of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Total gross value	$ 156,865	$ 151,356
Less accumulated depreciation	(97,704)	(94,835)
Total net value	59,161	56,521
Land
Property, Plant and Equipment [Line Items]
Total gross value	2,706	2,706
Buildings and improvements
Property, Plant and Equipment [Line Items]
Total gross value	18,590	18,640
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total gross value	118,056	116,757
Office furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Total gross value	6,886	6,228
Automotive equipment
Property, Plant and Equipment [Line Items]
Total gross value	1,646	1,762
Construction in progress
Property, Plant and Equipment [Line Items]
Total gross value	$ 8,981	$ 5,263

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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