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Other Long-Term Liabilities (Details 2) (USD $) | 3 Months Ended | 9 Months Ended | 1 Months Ended | 3 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 Development Services Agreement | Sep. 30, 2013 Development Services Agreement
Other Long-Term Liabilities |  |  |  |  |  |
Approved project plan for the development services |  |  |  |  | $ 4,800,000 |
Term of the agreement |  |  |  |  | 3 years |
Upfront payment recognized as revenue over the term of the agreement |  |  |  |  | 1,300,000 |
Revenue related to the Rockefeller agreement | $ 940,000 | $ 79,000 | $ 1,040,000 | $ 228,000 |  | $ 900,000

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