4. Property And Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Property, plant and equipment, gross	$ 51,010	$ 51,280
Less accumulated depreciation	(28,390)	(26,707)
Property, plant and equipment, net	22,620	24,573
Land [Member]
Property, plant and equipment, gross	1,565	1,747
Buildings And improvements [Member]
Property, plant and equipment, gross	17,119	17,520
Machinery And Equipment [Member]
Property, plant and equipment, gross	29,891	29,692
Vehicles [Member]
Property, plant and equipment, gross	778	937
Office Equipment [Member]
Property, plant and equipment, gross	851	838
Construction In Progress [Member]
Property, plant and equipment, gross	$ 806	$ 546

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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