| Other Assets | 12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dec. 31, 2015 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other Assets | 8. OTHER ASSETS 
 Other assets consist of the following: 
 
 
 See Note 17  Commitments and Contingencies  Business Agreements for details associated with the Nissan North America (Nissan) direct current fast chargers (DCFC). | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| X | ||||||||||
| 
- References No definition available. 
 | 
| X | ||||||||||
| 
- Definition The entire disclosure for other assets. This disclosure includes other current assets and other noncurrent assets. No definition available. 
 |