Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Principles (Details 1)

v3.8.0.1
Summary of Significant Accounting Principles (Details 1)
12 Months Ended
Dec. 31, 2017
Buildings [Member] | Minimum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives 15 years
Buildings [Member] | Maximum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives 30 years
Leasehold improvements [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives 7 years
Software [Member] | Minimum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives 3 years
Software [Member] | Maximum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives 6 years
Equipment [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives 5 years
Vehicles and prototypes [Member] | Minimum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives 3 years
Vehicles and prototypes [Member] | Maximum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives 5 years