Property and Equipment - Components of Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Components of Property, Plant and Equipment
Property and equipment	$ 78,764	$ 82,462
Less accumulated depreciation	(37,584)	(36,977)
Property and equipment, net	41,180	45,485
Land
Components of Property, Plant and Equipment
Property and equipment	4,372	4,372
Buildings and leasehold improvements
Components of Property, Plant and Equipment
Property and equipment	37,729	37,719
Machinery and equipment
Components of Property, Plant and Equipment
Property and equipment	26,871	26,995
Fixed assets in progress
Components of Property, Plant and Equipment
Property and equipment	1,462	581
Furniture and fixtures
Components of Property, Plant and Equipment
Property and equipment	1,670	1,573
Transportation equipment
Components of Property, Plant and Equipment
Property and equipment	1,448	1,852
Computer equipment and software
Components of Property, Plant and Equipment
Property and equipment	$ 5,212	$ 9,370

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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