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Segment Reporting (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Summary of segment information          
Total assets $ 99,847   $ 99,847   $ 104,713
Net revenues from external customers 10,608 9,580 26,566 21,231  
Depreciation and amortization expense 669 669 1,337 1,339  
Write-off of in-process research and development 0 480 0 480  
Operating (loss) income 1,358 1,514 6,458 5,447  
Interest expense, net 181 453 429 1,361  
Income tax expense from continuing operations (47) 110 6 176  
Gain on sale of Avinza Product Line before income taxes 0 2,397 0 2,588  
Ligand
          
Summary of segment information          
Total assets 32,577   32,577   38,408
Net revenues from external customers 5,692 3,820 12,483 10,057  
Depreciation and amortization expense 68 59 134 117  
Write-off of in-process research and development   0      
Operating (loss) income (867) (1,200) (938) 198  
Interest expense, net 181 453 429 1,361  
Income tax expense from continuing operations (45) 145 (6) 205  
Gain on sale of Avinza Product Line before income taxes   2,397   2,588  
CyDex
          
Summary of segment information          
Total assets 67,270   67,270   66,305
Net revenues from external customers 4,916 5,760 14,083 11,174  
Depreciation and amortization expense 601 610 1,203 1,222  
Write-off of in-process research and development   480      
Operating (loss) income 2,225 2,714 7,396 5,249  
Interest expense, net 0    0 0  
Income tax expense from continuing operations (2) (35) 0 (29)  
Gain on sale of Avinza Product Line before income taxes   $ 0   $ 0