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Property, Plant, and Equipment, Net
 3 Months Ended
Mar. 31, 2020
Property, Plant and Equipment [Abstract]  
Property, Plant, and Equipment Property, Plant, and Equipment, Net
Property, plant, and equipment, net consists of the following (in thousands):
March 31,
2020		December 29,
2019		Depreciable
Life – Years
Land$1,663  $1,663    
Buildings5,934  5,934  
23 – 40
Shop equipment23,053  22,982  
7 – 10
Leasehold improvements1,225  1,234  
3 – 10
Office equipment1,858  1,866  
3 – 7
Mobile equipment160  190  3
Construction in progress1,888  1,543  
Total cost35,781  35,412    
Less: Accumulated depreciation12,685  11,997  
Net property, plant, and equipment, net$23,096  $23,415  
Depreciation expense was $0.7 million for the three months ended March 31, 2020, and $0.7 million for the three months ended March 31, 2019.
Included in property, plant, and equipment are assets located in Mexico with a carrying amount of $4.1 million and $4.1 million at March 31, 2020 and December 29, 2019, respectively, and assets located in Canada with a carrying amount of $0.6 million and $0.6 million at March 31, 2020 and December 29, 2019, respectively.