Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments (Details)

v2.4.0.6
Financial Instruments (Details) (Recurring [Member], USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Liabilities:    
Liabilities, Current portion, contingent value rights - CyDex $ 8,058 $ 17,298
Current portion of liability for contingent liabilities - CyDex [Member]
   
Liabilities:    
Liabilities, Current portion, contingent value rights - CyDex 323 6,879
Liability for contingent value right - Metabasis [Member]
   
Liabilities:    
Liabilities, Current portion, contingent value rights - CyDex    1,068
Liability for contingent value right - Neurogen [Member]
   
Liabilities:    
Liabilities, Current portion, contingent value rights - CyDex 500 700
Long-term portion of contingent liabilities - CyDex [Member]
   
Liabilities:    
Liabilities, Current portion, contingent value rights - CyDex 7,235 8,651
Certificates of deposit [Member]
   
Assets:    
Assets, Short-term investments    10,000
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
   
Liabilities:    
Liabilities, Current portion, contingent value rights - CyDex    1,068
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Current portion of liability for contingent liabilities - CyDex [Member]
   
Liabilities:    
Liabilities, Current portion, contingent value rights - CyDex      
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Liability for contingent value right - Metabasis [Member]
   
Liabilities:    
Liabilities, Current portion, contingent value rights - CyDex    1,068
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Liability for contingent value right - Neurogen [Member]
   
Liabilities:    
Liabilities, Current portion, contingent value rights - CyDex      
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Long-term portion of contingent liabilities - CyDex [Member]
   
Liabilities:    
Liabilities, Current portion, contingent value rights - CyDex      
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Certificates of deposit [Member]
   
Assets:    
Assets, Short-term investments    10,000
Significant Other Observable Inputs (Level 2) [Member]
   
Liabilities:    
Liabilities, Current portion, contingent value rights - CyDex      
Significant Other Observable Inputs (Level 2) [Member] | Current portion of liability for contingent liabilities - CyDex [Member]
   
Liabilities:    
Liabilities, Current portion, contingent value rights - CyDex      
Significant Other Observable Inputs (Level 2) [Member] | Liability for contingent value right - Metabasis [Member]
   
Liabilities:    
Liabilities, Current portion, contingent value rights - CyDex      
Significant Other Observable Inputs (Level 2) [Member] | Liability for contingent value right - Neurogen [Member]
   
Liabilities:    
Liabilities, Current portion, contingent value rights - CyDex      
Significant Other Observable Inputs (Level 2) [Member] | Long-term portion of contingent liabilities - CyDex [Member]
   
Liabilities:    
Liabilities, Current portion, contingent value rights - CyDex      
Significant Other Observable Inputs (Level 2) [Member] | Certificates of deposit [Member]
   
Assets:    
Assets, Short-term investments      
Significant Unobservable Inputs (Level 3) [Member]
   
Liabilities:    
Liabilities, Current portion, contingent value rights - CyDex 8,058 16,230
Significant Unobservable Inputs (Level 3) [Member] | Current portion of liability for contingent liabilities - CyDex [Member]
   
Liabilities:    
Liabilities, Current portion, contingent value rights - CyDex 323 6,879
Significant Unobservable Inputs (Level 3) [Member] | Liability for contingent value right - Metabasis [Member]
   
Liabilities:    
Liabilities, Current portion, contingent value rights - CyDex      
Significant Unobservable Inputs (Level 3) [Member] | Liability for contingent value right - Neurogen [Member]
   
Liabilities:    
Liabilities, Current portion, contingent value rights - CyDex 500 700
Significant Unobservable Inputs (Level 3) [Member] | Long-term portion of contingent liabilities - CyDex [Member]
   
Liabilities:    
Liabilities, Current portion, contingent value rights - CyDex 7,235 8,651
Significant Unobservable Inputs (Level 3) [Member] | Certificates of deposit [Member]
   
Assets:    
Assets, Short-term investments