Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Principles (Tables)

v3.4.0.3
Summary of Significant Accounting Principles (Tables)
3 Months Ended
Mar. 31, 2016
Summary of Significant Accounting Principles [Abstract]  
Schedule of estimated useful lives

Buildings:  15 - 30 years

Leasehold improvements:  7 years

Software:  3 - 6 years

Equipment:  5 years

Vehicles and prototypes:  3 - 5 years

Income taxes

Approximate net operating loss
($ millions)
    Carryover to be used against taxable income generated through year  
             
  3.6       2030  
  6.7       2031  
  3.9       2032  
  4.7       2033  
  6.1       2034  
  9.0       2035  
  4.1       2036