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Property, Plant and Equipment
 12 Months Ended
Dec. 31, 2023
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Property, Plant and Equipment
Property, plant, and equipment, net consists of the following (in thousands):
    Estimated Useful Lives (Years)
December 31,
20232022
LandN/A$840 $840 
Building and land improvements
5-40
13,134 9,031 
Machinery and equipment
3-5
17,528 12,371 
Furniture and fixtures
3-7
2,766 1,787 
Vehicles
5
125 125 
34,393 24,154 
Less: accumulated depreciation(9,557)(7,284)
Property, plant and equipment, net$24,836 $16,870 

Depreciation expense for the years ended December 31, 2023, 2022 and 2021 was $2.6 million, $1.9 million and $1.7 million, respectively. During the years ended December 31, 2023, 2022 and 2021, $2.0 million, $1.5 million and $1.5 million, respectively, of depreciation expense was allocated to cost of revenue and $0.6 million, $0.4 million and $0.2 million, respectively, of depreciation expense was allocated to operating expenses.