Quarterly report pursuant to Section 13 or 15(d)

Non-Controlling Interests - Summary Of Components of Non-Controlling Interests in Loss of Consolidated Entities (Detail)

v3.5.0.2
Non-Controlling Interests - Summary Of Components of Non-Controlling Interests in Loss of Consolidated Entities (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Noncontrolling Interest [Line Items]          
Non-controlling interests in loss of consolidated entities $ (3,975) $ (1,694) $ (12,324) $ (2,416) $ (5,455)
Avenue [Member]          
Noncontrolling Interest [Line Items]          
Non-controlling interests in loss of consolidated entities $ (47) $ (367) $ (231) $ (401) (567)
Non-controlling ownership 10.50% 11.50% 10.50% 11.50%  
Coronado SO Co, Inc [Member]          
Noncontrolling Interest [Line Items]          
Non-controlling interests in loss of consolidated entities $ (4) $ (7) $ (14) $ (237) (240)
Non-controlling ownership 13.00% 13.00% 13.00% 13.00%  
Mustang Therapeutics, Inc [Member]          
Noncontrolling Interest [Line Items]          
Non-controlling interests in loss of consolidated entities $ (204) $ (54) $ (363) $ (321) (373)
Non-controlling ownership 23.90% 10.00% 23.90% 10.00%  
Checkpoint Therapeutics, Inc [Member]          
Noncontrolling Interest [Line Items]          
Non-controlling interests in loss of consolidated entities $ (3,254) [1] $ (977) $ (10,767) [1] $ (1,168) (3,855)
Non-controlling ownership 62.70% [1] 20.00% 62.70% [1] 20.00%  
JMC [Member]          
Noncontrolling Interest [Line Items]          
Non-controlling interests in loss of consolidated entities $ (104) $ (289) $ (333) $ (289) $ (420)
Non-controlling ownership 8.10% 25.00% 8.10% 25.00%  
Helocyte [Member]          
Noncontrolling Interest [Line Items]          
Non-controlling interests in loss of consolidated entities $ (362)   $ (616)    
Non-controlling ownership 20.60%   20.60%    
[1] Checkpoint is consolidated with Fortress’ operations because Fortress maintains voting control through its ownership of Checkpoint’s Class A Common Shares which provide super-majority voting rights.