Summary of Siginificant Accounting Policies (Details) |
6 Months Ended | |
|---|---|---|
|
Jun. 30, 2015
USD ($)
|
Dec. 31, 2014
USD ($)
|
|
| Basis of Presentation | ||
| Minimum term of extended warranty contracts sold | 5 years | |
| Maximum term of extended warranty contracts sold | 10 years | |
| Unbilled amounts | $ 500,000 | $ 1,000,000 |
| HyPulsion | ||
| Joint Venture | ||
| Ownership interest percentage | 20.00% | |
| Minimum | ||
| Research and Development. | ||
| Cost Sharing Percentages of research and development contracts | $ 30 | |
| Maximum | ||
| Research and Development. | ||
| Cost Sharing Percentages of research and development contracts | $ 50 | |
| Axane, S.A. | HyPulsion | ||
| Joint Venture | ||
| Ownership interest percentage | 80.00% | |
| Additional ownership interest that can be purchased by entity from counterparty at any time between January 4, 2018 and January 29, 2018 at a formula price | 60.00% | |
| Remaining ownership interest to be acquired by Company upon exercise of its purchase right | 20 |