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Property, Plant and Equipment (Tables)
12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
Schedule of Property, Plant and Equipment
Property, plant and equipment consist of the following:
(in thousands)20202019
Land$$63 
Leasehold improvements2,939 1,921 
Buildings84 214 
Machinery, fixtures and equipment100,352 100,300 
Construction-in-progress2,772 2,999 
 106,150 105,497 
Less accumulated depreciation71,054 64,807 
Property, plant and equipment, net$35,096 $40,690