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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2018
Text block [abstract]  
Schedule of Estimated Useful Lives and Depreciation Calculation Methods

Depreciation is calculated at annual rates designed to write off the costs of assets over their estimated useful lives as follows:

 

    Engineering equipment    5 to 10 years    straight-line
    Office equipment    5 to 10 years    straight-line
    Leasehold improvements       straight-line over term of lease to a maximum of
15 years or the improvement’s economic life
    Other    5 to 50 years    straight-line