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Property, Plant and Equipment
 6 Months Ended
Jun. 30, 2021
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Property, Plant and Equipment
Property, plant and equipment consist of the following:
(in thousands)June 30, 2021December 31, 2020
Land$3 $3 
Leasehold improvements2,971 2,939 
Buildings— 84 
Machinery, fixtures and equipment101,283 100,352 
Construction-in-progress1,702 2,772 
105,959 106,150 
Less: accumulated depreciation and amortization(74,182)(71,054)
Property, plant and equipment, net$31,777 $35,096