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Property, Plant and Equipment
 6 Months Ended
Jun. 30, 2023
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Property, Plant and Equipment
Property, plant and equipment from continuing operations consist of the following:
(in thousands)June 30, 2023December 31, 2022
Land$723 $723 
Leasehold improvements3,651 4,114 
Buildings1,534 1,534 
Machinery, fixtures and equipment100,670 99,786 
Construction-in-progress2,190 1,881 
108,768 108,038 
Less: accumulated depreciation and amortization(74,404)(70,993)
Property, plant and equipment, net$34,364 $37,045 

The following table sets forth depreciation expense related to property, plant and equipment:
Three Months Ended June 30,Six Months Ended
June 30,
(in thousands)2023202220232022
Cost of sales$1,536 $1,562 $3,115 $3,083 
Selling, general and administrative96 59 128 118 
Total depreciation$1,632 $1,621 $3,243 $3,201