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Financial Instruments (Details 1) (CyDex, USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Credit Derivatives [Line Items]    
Amount Of Revenue For Contingent Consideration $ 15  
Contingent Consideration
    
Credit Derivatives [Line Items]    
Revenue volatility 25.00% 25.00%
Average of probability of commercialization 67.60% 68.40%
Sales beta 0.60 0.60
Credit rating BBB BBB
Equity risk premium 6.00% 6.00%
Minimum | Contingent Consideration
    
Credit Derivatives [Line Items]    
Range of annual revenue subject to revenue sharing 4.2 [1] 3.6 [1]
Maximum | Contingent Consideration
    
Credit Derivatives [Line Items]    
Range of annual revenue subject to revenue sharing $ 19.8 [1] $ 28.3 [1]
[1] Revenue subject to revenue sharing represent management’s estimate of the range of total annual revenue subject to revenue sharing (i.e. annual revenues in excess of $15 million) through December 31, 2016, which is the term of the CVR agreement.