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Property, Plant and Equipment
 6 Months Ended
Jun. 30, 2023
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Note 7—Property, Plant & Equipment
Major classes of property, plant and equipment, consisted of the following:
$ in thousandsEstimated Useful Lives in YearsJune 30, 2023December 31, 2022
Leasehold improvements
5 — 7
$2,944 $2,931 
Computer equipment
2 — 3
2,151 2,124 
Machinery, vehicles and other equipment
5 — 10
3,909 3,528 
Furniture and fixtures
2 — 5
652 646 
Construction in progress
495 419 
Total property, plant and equipment
10,151 9,648 
Accumulated depreciation
(3,725)(2,577)
Total property, plant and equipment, net
$6,426 $7,071 
Depreciation expense for property, plant and equipment was $0.6 million and $0.4 million for the three months ended June 30, 2023 and 2022, respectively, and $1.2 million and $0.7 million for the six months ended June 30, 2023 and 2022, respectively, and is recorded in SG&A expense with a portion allocated to cost of services revenue.