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Property, Plant and Equipment, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Property, plant and equipment [Abstract]
Property, plant and equipment, net	$ 119,878	$ 115,825
Machinery and equipment
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	49,621	48,206
Less: accumulated depreciation and amortization	(38,198)	(37,832)
Building
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	94,253	94,567
Less: accumulated depreciation and amortization	(15,964)	(15,324)
Leasehold improvements
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	6,330	6,285
Less: accumulated depreciation and amortization	(4,761)	(4,616)
Construction in progress
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	28,597	24,539
Construction in progress Dingxin and Kazuo locations
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	16,800	14,200
Construction in progress manufacturing equipment purchases
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	4,500	4,000
Construction in progress other consolidated subsidiaries
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	$ 7,300	$ 6,300

X

- Definition

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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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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