Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Property, plant and equipment consist of the following (in thousands):


	December 31, 2017			December 31, 2016
Land	$	1,023		$	—
Buildings		764			—
Leasehold improvements		15,673			14,592
Equipment		21,904			15,214
Furniture and fixtures		4,272			3,218
Construction in progress		2,581			1,264

Total property, plant and equipment		46,217			34,288
Less: accumulated depreciation		(23,800	)		(19,332	)

Property, plant and equipment, net	$	22,417		$	14,956

Depreciation is calculated using the straight-line method over the estimated useful life of the asset as follows:


Classification		Estimated Useful Life
Buildings		Thirty years
Leasehold improvements		Shorter of the term of the lease or estimated useful life
Equipment		Three to twelve years
Furniture and fixtures		Three to eight years