Property and Equipment

12 Months Ended

Dec. 31, 2016

Property, Plant and Equipment [Abstract]

Property and Equipment

Property and Equipment

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

	December 31, 2016			December 31, 2015
Manufacturing equipment	$	24,982		$	22,049
Office equipment and software	23,090			25,087
Leasehold improvements	2,964			4,183
Property and equipment, gross	51,036			51,319
Less: accumulated depreciation and amortization	(44,323		)	(45,185		)
Property and equipment, net	$	6,713		$	6,134

Depreciation expense associated with property and equipment for the years ended December 31, 2016, 2015 and 2014 was $4.5 million, $5.6 million and $7.0 million.