Property and Equipment

3 Months Ended

Mar. 31, 2019

Property, Plant and Equipment [Abstract]

Property and Equipment

Property and Equipment 

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

	March 31, 2019			December 31, 2018
Leasehold improvements	$	5,281		$	4,804
Lab and clean room equipment	14,197			13,787
Furniture and office equipment	15,427			15,145
Construction in progress	984			1,507
Property and equipment, gross	35,889			35,243
Less accumulated depreciation	(19,512		)	(17,819		)
Property and equipment, net	$	16,377		$	17,424

Depreciation expense for the three months ended March 31, 2019 and 2018, was approximately $1.7 million and $1.2 million, respectively.