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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The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

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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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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services 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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Property, Plant, and equipment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Jan. 01, 2019	Dec. 31, 2018
Property, Plant, and Equipment
Property, plant and equipment, gross	$ 64,385		$ 64,385			$ 40,449
Less accumulated depreciation	(18,570)		(18,570)			(13,114)
Property, Plant and Equipment, Net, Total	45,815		45,815		$ 27,335	27,335
Depreciation and amortization expense	2,400	$ 1,800	5,600	$ 4,800
Leasehold improvements
Property, Plant, and Equipment
Property, plant and equipment, gross	12,485		12,485			10,776
Equipment
Property, Plant, and Equipment
Property, plant and equipment, gross	21,013		21,013			14,477
Vehicles and accessories
Property, Plant, and Equipment
Property, plant and equipment, gross	4,240		4,240			3,989
Computer equipment and software
Property, Plant, and Equipment
Property, plant and equipment, gross	7,513		7,513			5,839
Buildings
Property, Plant, and Equipment
Property, plant and equipment, gross	10,033		10,033			2,479
Furniture and fixtures
Property, Plant, and Equipment
Property, plant and equipment, gross	1,658		1,658			1,547
Land
Property, Plant, and Equipment
Property, plant and equipment, gross	4,557		4,557			660
Construction in Progress
Property, Plant, and Equipment
Property, plant and equipment, gross	$ 2,886		$ 2,886			$ 682