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Property and Equipment (Tables)
6 Months Ended
Jun. 30, 2019
Property, Plant and Equipment [Abstract]  
Components of Property and Equipment
Property and equipment, net, consisted of the following:
 
June 30,
2019
 
December 31,
2018
 
(in thousands)
Lab equipment
$
2,518

 
$
2,489

Leasehold improvements
741

 
741

Computer hardware and software
447

 
428

Furniture and fixtures
166

 
159

Property and equipment, gross
3,872

 
3,817

Less: accumulated depreciation and amortization
(3,220
)
 
(3,090
)
Property and equipment, net
$
652

 
$
727