Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Property Plant And Equipment [Abstract]

Component of Property and Equipment

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

	Estimated Useful	December 31,
	Life (In years)	2017			2016
Manufacturing equipment	5-14	$	12,104		$	10,086
Lab equipment	5-13		6,686			6,280
Computer equipment	3		4,760			4,010
Furniture and fixtures	3-13		1,629			1,566
Leasehold improvements	5-8(1)		10,873			8,942
Assets in progress			1,176			2,298
			37,228			33,182
Less accumulated depreciation and amortization			(20,609	)		(16,008	)
Total		$	16,619		$	17,174

(1) Leasehold improvements are amortized over the remaining life of the initial lease term or the estimated useful lives of the assets, whichever is shorter.