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Property, Plant and Equipment, net (Tables)
 12 Months Ended
Dec. 31, 2023
Property, Plant and Equipment [Abstract]  
Schedule of Property, Plant and Equipment, net
Expected useful lives for property, plant and equipment are reviewed at least annually. Estimated useful lives are as follows:
Estimated useful
life in years
Computer equipment
3
Furniture and fixtures
7
Laboratory equipment
3-10
Leasehold improvements
shorter of 5 or lease term
Assets subject to finance leaselease term
Property, plant and equipment, net were as follows:
 December 31, 2023December 31, 2022
United StatesEuropeTotalUnited StatesEuropeTotal
Computer equipment
$1,755 $559 $2,314 $1,256 $252 $1,508 
Furniture and fixtures
1,181 39 1,220 1,062 38 1,100 
Laboratory equipment
5,086 594 5,680 3,646 483 4,129 
Leasehold improvements
2,764 4,683 7,447 2,229 4,475 6,704 
Finance lease ROU assets— 2,004 2,004 — 944 944 
Construction in process3,782 — 3,782 1,408 — 1,408 
Property, plant and equipment, gross14,568 7,879 22,447 9,601 6,192 15,793 
Less: accumulated depreciation
(4,631)(1,907)(6,538)(2,785)(247)(3,032)
Total property, plant and equipment, net$9,937 $5,972 $15,909 $6,816 $5,945 $12,761 
The table below presents the depreciation expense related to property, plant and equipment for the following periods:
Year Ended
 December 31, 2023December 31, 2022
Depreciation expense
$3,512 $3,325