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Property and Equipment, Net
 9 Months Ended
Sep. 30, 2023
Property, Plant and Equipment [Abstract]  
Property and Equipment, Net Property and Equipment, Net
Property and equipment, net consisted of the following (in thousands):
September 30,December 31,
20232022
Lab equipment
$26,362 $31,188 
Office equipment
4,416 3,573 
Furniture and fixtures
1,982 1,221 
Leasehold improvements
12,655 13,583 
Assets under construction
18,239 13,186 
Less: accumulated depreciation
(29,017)(27,542)
Total property and equipment, net
$34,637 $35,209 

Depreciation expense for the three months ended September 30, 2023 and 2022 was $1.4 million and $1.8 million, respectively, and for the nine months ended September 30, 2023 and 2022 was $4.8 million and $5.7 million, respectively.