Property, Plant and Equipment, net (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, plant and equipment
Gross	$ 57,045	$ 48,352
Accumulated depreciation	(22,073)	(18,512)
Net	34,972	29,840
Depreciation expense	4,200	3,400	$ 2,600
Land and building
Property, plant and equipment
Gross	15,881	10,887
Machinery and equipment
Property, plant and equipment
Gross	34,312	30,768
Construction in progress
Property, plant and equipment
Gross	$ 6,852	$ 6,697

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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