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Property and Equipment
 3 Months Ended
Mar. 31, 2021
Property, Plant and Equipment [Abstract]  
Property and Equipment Property and Equipment
Property and equipment consists of the following (in thousands):
 March 31,December 31,
 20212020
Laboratory equipment$4,429 $4,427 
Computer equipment and software694 532 
Leasehold improvements38 38 
Furniture and fixtures327 327 
Office equipment163 163 
Construction in process30 163 
Total property and equipment5,681 5,650 
Less accumulated depreciation(4,380)(4,255)
Property and equipment, net$1,301 $1,395 

Depreciation expense was $0.1 million and $0.2 million for the three months ended March 31, 2021 and 2020, respectively.