Property and Equipment
 3 Months Ended
Mar. 31, 2021
Property, Plant and Equipment [Abstract]  
Property and Equipment Property and Equipment
The following table presents the composition of property and equipment, net as of March 31, 2021 and December 31, 2020 (in thousands):

As of March 31,
2021		As of December 31,
2020
Lab equipment$11,835 $8,994 
Computer hardware, software and telephone140 140 
Furniture and fixtures107 107 
Leasehold improvements67 67 
Construction in progress1,243 1,042 
13,392 10,350 
Less accumulated depreciation(2,600)(2,126)
Property and equipment, net$10,792 $8,224 

Depreciation expense was $0.5 million and $0.1 million for the three months ended March 31, 2021 and 2020, respectively.