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Fair Value Measurement (Details 1) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Credit Derivatives [Line Items]      
Change in fair value of Viking convertible notes $ (765) $ 0 $ 0
CyDex      
Credit Derivatives [Line Items]      
Amount Of revenue for contingent consideration 15,000    
CyDex | Contingent Consideration      
Credit Derivatives [Line Items]      
Range of annual revenue subject to revenue sharing [1] $ 22,500    
Revenue volatility (percent) 25.00% 25.00%  
Average of probability of commercialization (percent) 73.00% 81.00%  
Sales beta (decimal) 0.40 0.60  
Credit rating (non-numeric) BB B  
Equity risk premium (percent) 6.00% 6.00%  
CyDex | Minimum | Contingent Consideration      
Credit Derivatives [Line Items]      
Range of annual revenue subject to revenue sharing [1]   $ 17,200  
CyDex | Maximum | Contingent Consideration      
Credit Derivatives [Line Items]      
Range of annual revenue subject to revenue sharing [1]   $ 17,300  
[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.