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Property, Plant and Equipment (Details 1)
 12 Months Ended
Dec. 31, 2018
Buildings  
Useful lives or depreciation rates, property, plant and equipment 25 years
Building improvements  
Useful lives or depreciation rates, property, plant and equipment 4-16 years
Machinery  
Useful lives or depreciation rates, property, plant and equipment 4-6 years
Research and development equipment  
Useful lives or depreciation rates, property, plant and equipment 2-6 years
Office furniture and equipment  
Useful lives or depreciation rates, property, plant and equipment 3-8 years
Others  
Useful lives or depreciation rates, property, plant and equipment 2-15 years