Property, Plant, and Equipment, Net - Schedule of Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 40,151	$ 36,940
Accumulated depreciation	17,584	14,557
Property, plant, and equipment, net	22,567	22,383
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment	538	538
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 7,630	6,923
Buildings | Minimum
Property, Plant and Equipment [Line Items]
Depreciable Life – Years	23 years
Buildings | Maximum
Property, Plant and Equipment [Line Items]
Depreciable Life – Years	40 years
Shop equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 26,049	23,436
Shop equipment | Minimum
Property, Plant and Equipment [Line Items]
Depreciable Life – Years	7 years
Shop equipment | Maximum
Property, Plant and Equipment [Line Items]
Depreciable Life – Years	10 years
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 1,283	1,245
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Depreciable Life – Years	3 years
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Depreciable Life – Years	10 years
Office equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 3,047	2,331
Office equipment | Minimum
Property, Plant and Equipment [Line Items]
Depreciable Life – Years	3 years
Office equipment | Maximum
Property, Plant and Equipment [Line Items]
Depreciable Life – Years	7 years
Mobile equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 50	152
Mobile equipment | Minimum
Property, Plant and Equipment [Line Items]
Depreciable Life – Years	3 years
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 1,554	$ 2,315