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Property, Plant and Equipment, Net
 6 Months Ended
Jun. 30, 2024
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment, Net Property, Plant and Equipment, Net
Property, plant and equipment, net consists of the following (dollars in thousands, unaudited):

June 30,December 31,
20242023
Building and leasehold improvements$30,292 $29,098 
Machinery and equipment20,476 18,856 
Computer equipment and software14,743 6,847 
Furniture and fixtures2,893 2,856 
Land1,547 1,547 
Vehicles889 889 
Construction in progress12,719 21,602 
Property, plant, and equipment, gross83,559 81,695 
Less: accumulated depreciation and amortization(18,175)(13,369)
Total property, plant and equipment, net$65,384 $68,326 

The total depreciation expense for internal use software was $1,014 and $2,003 for the three and six months ended June 30, 2024, respectively and $179 and $532 for the three and six months ended June 30, 2023, respectively.

Substantially all long-lived assets are located in the United States.