Quarterly report pursuant to Section 13 or 15(d)

Licenses Acquired - Summary Of Research and Development Arrangement Contract (Detail)

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Licenses Acquired - Summary Of Research and Development Arrangement Contract (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total $ 1,548 $ 0 $ 8,987 $ 0
EGFR inhibitors [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total     1,000  
IV Tramadol [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total [1]     3,000  
Mustang Therapeutics, Inc [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total     2,147  
Checkpoint Therapeutics, Inc [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total     1,033  
Coronado SO Co, Inc [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total     1,607  
Helocyte [Member]        
Research and Development Arrangement, Contract to Perform for Others [Line Items]        
Research and Development Total     $ 200  
[1] The Company intends to transfer this license to Avenue.