Supplementary Balance Sheet Information - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, and equipment, gross	$ 64,027	$ 59,438
Less accumulated depreciation	(40,626)	(37,793)
Total property and equipment, net	23,401	21,645
Land
Property, Plant and Equipment [Line Items]
Property, and equipment, gross	995	550
Buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, and equipment, gross	5,450	1,989
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, and equipment, gross	$ 57,582	$ 56,899

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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