Quarterly report pursuant to Section 13 or 15(d)

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

v3.5.0.2
Licenses Acquired - Summary Of Research and Development Arrangement Contract (Detail) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 9 Months Ended
Apr. 28, 2015
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Research and Development Arrangement, Contract to Perform for Others [Line Items]          
Research and Development Total   $ 1,000 $ 1,895 $ 3,143 $ 10,882
Mustang Therapeutics, Inc [Member]          
Research and Development Arrangement, Contract to Perform for Others [Line Items]          
Research and Development Total   0 0 0 2,147
Checkpoint Therapeutics, Inc [Member]          
Research and Development Arrangement, Contract to Perform for Others [Line Items]          
Research and Development Total   1,000 600 3,060 2,633
Coronado SO Co, Inc [Member]          
Research and Development Arrangement, Contract to Perform for Others [Line Items]          
Research and Development Total   0 0 0 1,607
Helocyte [Member]          
Research and Development Arrangement, Contract to Perform for Others [Line Items]          
Research and Development Total $ 200 0 0 83 200
Escala [Member]          
Research and Development Arrangement, Contract to Perform for Others [Line Items]          
Research and Development Total   0 1,295 0 1,295
Avenue Therapeutics, Inc. [Member]          
Research and Development Arrangement, Contract to Perform for Others [Line Items]          
Research and Development Total   $ 0 $ 0 $ 0 $ 3,000