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Property, Plant and Equipment, Net
 6 Months Ended
Jun. 26, 2021
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment, Net PROPERTY, PLANT AND EQUIPMENT, NET
Property, plant and equipment consists of the following:
June 26,
2021		December 26,
2020
Land and improvements$3,422 $3,422 
Buildings and improvements51,479 51,479 
Machinery and equipment182,476 181,642 
Assets under construction2,422 1,167 
239,799 237,710 
Accumulated depreciation(184,760)(179,806)
Property, plant and equipment, net$55,039 $57,904 

Depreciation of property, plant and equipment, including amounts for finance leases, totaled $2,502 and $5,029 in the three and six months ended June 26, 2021, respectively, and $2,505 and $5,485 in the three and six months ended June 27, 2020, respectively.