|
SUMMARY OF SIGNIFICANT ACCOUNTING PRINICPLES - Estimated useful lives (Details)
|
6 Months Ended |
|---|---|
|
Jun. 30, 2014
|
|
|
Buildings
|
|
| Property, Plant and Equipment [Line Items] | |
| Estimated useful lives | 15 - 30 years |
|
Leasehold improvements
|
|
| Property, Plant and Equipment [Line Items] | |
| Estimated useful lives | 7 years |
|
Software
|
|
| Property, Plant and Equipment [Line Items] | |
| Estimated useful lives | 3 - 6 years |
|
Equipment
|
|
| Property, Plant and Equipment [Line Items] | |
| Estimated useful lives | 5 years |
|
Vehicles and prototypes
|
|
| Property, Plant and Equipment [Line Items] | |
| Estimated useful lives | 3 - 5 years |