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Property, Plant and Equipment
 3 Months Ended
Mar. 31, 2023
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Property, Plant and Equipment
Property, plant and equipment consist of the following:
(in thousands)March 31, 2023December 31, 2022
Land$723 $723 
Leasehold improvements4,203 4,114 
Buildings1,534 1,534 
Machinery, fixtures and equipment114,780 113,413 
Construction-in-progress2,866 3,270 
124,106 123,054 
Less: accumulated depreciation and amortization(82,661)(80,708)
Property, plant and equipment, net$41,445 $42,346 

The following table sets forth depreciation expense related to property, plant and equipment:
Three Months Ended March 31,
(in thousands)20232022
Cost of sales$1,917 $2,054 
Selling, general and administrative74 62 
Total depreciation$1,991 $2,116