Property and Equipment (Tables)

3 Months Ended

Mar. 31, 2018

Property, Plant and Equipment [Abstract]

Summary of Property and Equipment

Property and equipment consists of the following:

		March 31,			December 31,
(in thousands)	Useful life (years)	2018			2017
Computer hardware and software	3-5	$	3,829		$	3,732
Manufacturing and lab equipment	2-7	46,751			43,432
Office equipment and furniture	5-7	1,129			1,053
Leasehold improvements	2-12	18,721			18,580
		70,430			66,797
Accumulated depreciation		(50,619		)	(48,829		)
		$	19,811		$	17,968