Property and Equipment

3 Months Ended

Mar. 31, 2019

Property Plant And Equipment [Abstract]

Property and Equipment

3. Property and Equipment

Property and equipment, net, consist of the following (in thousands):

	As of
	March 31, 2019			December 31, 2018
Lab equipment and machinery	$	59,645		$	59,413
Leasehold improvements		6,429			6,420
Computer equipment and software		4,516			4,512
Furniture and fixtures		221			221
Construction in progress		1,030			1,025
Total property and equipment		71,841			71,591
Less accumulated depreciation		(68,716	)		(68,159	)
Property and equipment, net	$	3,125		$	3,432

The following table presents depreciation expense included in the Condensed Consolidated Statements of Operations and includes amortization of leasehold improvements (in thousands):

	Three Months Ended March 31,
	2019		2018
Depreciation expense	$	557	$	1,236