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)

v3.4.0.3
Non-Controlling Interests - Summary Of Components of Non-Controlling Interests in Loss of Consolidated Entities (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Noncontrolling Interest [Line Items]      
Non-controlling interests in loss of consolidated entities $ (4,438) $ (479) $ (5,455)
Avenue [Member]      
Noncontrolling Interest [Line Items]      
Non-controlling interests in loss of consolidated entities $ (108)   (567)
Non-controlling ownership 11.50%    
Coronado SO Co, Inc [Member]      
Noncontrolling Interest [Line Items]      
Non-controlling interests in loss of consolidated entities $ (5) $ (160) (240)
Non-controlling ownership 13.00% 13.00%  
Mustang Therapeutics, Inc [Member]      
Noncontrolling Interest [Line Items]      
Non-controlling interests in loss of consolidated entities $ (70) $ (226) (373)
Non-controlling ownership 10.00% 10.00%  
Checkpoint Therapeutics, Inc [Member]      
Noncontrolling Interest [Line Items]      
Non-controlling interests in loss of consolidated entities $ (4,037) $ (93) (3,855)
Non-controlling ownership 62.70% [1] 15.00%  
JMC [Member]      
Noncontrolling Interest [Line Items]      
Non-controlling interests in loss of consolidated entities $ (121)   $ (420)
Non-controlling ownership 8.10%    
Helocyte [Member]      
Noncontrolling Interest [Line Items]      
Non-controlling interests in loss of consolidated entities $ (97)    
Non-controlling ownership 8.30%    
[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.