Property and Equipment (Tables)

6 Months Ended

Jun. 30, 2021

Property, Plant and Equipment [Abstract]

Summary of Property and Equipment

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

	June 30, 2021		December 31, 2020
Leasehold improvements	$	8,039	$	6,010
Laboratory and clean room equipment	15,424		15,524
Furniture and equipment	15,062		15,295
Construction in progress	1,972		3,321
Asset retirement cost	860		785
Finance lease assets	189		—
Property and equipment, gross	41,546		40,935
Less accumulated depreciation	(31,273)		(29,498)
Property and equipment, net	$	10,273	$	11,437

Schedule of Depreciation Expense

Depreciation expense for each of the three and six months ended June 30, 2021 and 2020 is summarized in the table below (amounts in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Depreciation expense	$	1,306	$	1,422	$	2,467	$	2,928