Property, Plant, and Equipment, Net

12 Months Ended

Dec. 31, 2021

Property, Plant and Equipment [Abstract]

Property, Plant, and Equipment, Net

Property, Plant, and Equipment, Net

Property, plant, and equipment, net consists of the following:

	December 31, 2021		December 31, 2020		Depreciable Life – Years
	(dollars in thousands)
Land	$	538	$	538
Buildings	7,630		6,923		23 - 40
Shop equipment	26,049		23,436		7 - 10
Leasehold improvements	1,283		1,245		3 - 10
Office equipment	3,047		2,331		3 - 7
Mobile equipment	50		152		3
Construction in progress	1,554		2,315
Total cost	40,151		36,940
Accumulated depreciation	17,584		14,557
Property, plant, and equipment, net	$	22,567	$	22,383

Depreciation expense was $3.2 million for the twelve months ended December 31, 2021 and $3.0 million for the twelve months ended December 31, 2020.

Included in property, plant, and equipment, net are assets located in Mexico with a carrying amount of $3.5 million and $3.7 million at December 31, 2021 and December 31, 2020, respectively, and assets located in Canada with a carrying amount of $0.4 million and $0.4 million at December 31, 2021 and December 31, 2020, respectively.