Property and Equipment

9 Months Ended

Sep. 30, 2019

Property, Plant and Equipment [Abstract]

Property and Equipment

Property and Equipment 

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

	September 30, 2019			December 31, 2018
Leasehold improvements	$	5,312		$	4,804
Lab and clean room equipment	14,429			13,787
Furniture and office equipment	15,086			15,145
Construction in progress	765			1,507
Property and equipment, gross	35,592			35,243
Less accumulated depreciation	(22,412		)	(17,819		)
Property and equipment, net	$	13,180		$	17,424

Depreciation expense for the nine months ended September 30, 2019 and 2018, was approximately $5.0 million and $3.9 million, respectively, and approximately $1.6 million and $1.4 million for the three months ended September 30, 2019 and 2018, respectively.