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 6 Months Ended 12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Noncontrolling Interest [Line Items]          
Non-controlling interests in loss of consolidated entities $ (3,911) $ (243) $ (8,349) $ (722) $ (5,455)
Avenue [Member]          
Noncontrolling Interest [Line Items]          
Non-controlling interests in loss of consolidated entities $ (76) $ (34) $ (184) $ (34) (567)
Non-controlling ownership 11.50% 11.50% 11.50% 11.50%  
Coronado SO Co, Inc [Member]          
Noncontrolling Interest [Line Items]          
Non-controlling interests in loss of consolidated entities $ (5) $ (70) $ (10) $ (230) (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 $ (89) $ (41) $ (159) $ (267) (373)
Non-controlling ownership 10.00% 10.00% 10.00% 10.00%  
Checkpoint Therapeutics, Inc [Member]          
Noncontrolling Interest [Line Items]          
Non-controlling interests in loss of consolidated entities $ (3,476) $ (98) $ (7,513) $ (191) (3,855)
Non-controlling ownership 64.30% [1] 20.00% 64.30% [1] 20.00%  
JMC [Member]          
Noncontrolling Interest [Line Items]          
Non-controlling interests in loss of consolidated entities $ (108)   $ (229)   $ (420)
Non-controlling ownership 8.10%   8.10%    
Helocyte [Member]          
Noncontrolling Interest [Line Items]          
Non-controlling interests in loss of consolidated entities $ (157)   $ (254)    
Non-controlling ownership 20.40%   20.40%    
[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.