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Fair Value Measurements (Acquisition of CyDex) (Details) - Cydex Pharmaceuticals, Inc - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2016 | Dec. 31, 2015
Credit Derivatives [Line Items] |  |
Amount Of Revenue For Contingent Consideration | $ 15.0 |
Contingent Consideration Classified as Equity |  |
Credit Derivatives [Line Items] |  |
Range of annual revenue subject to revenue sharing | $ 23.5 | $ 22.5
Revenue volatility | 25.00% | 25.00%
Average of probability of commercialization | 78.00% | 73.00%
Sales beta | 0.30 | 0.40
Credit rating | BB | BB
Equity risk premium | 6.00% | 6.00%

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