Annual report pursuant to Section 13 and 15(d)

Non-Controlling Interests - Summary Of Non-controlling Interests in Consolidated Entities (Detail)

v3.6.0.2
Non-Controlling Interests - Summary Of Non-controlling Interests in Consolidated Entities (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Noncontrolling Interest [Line Items]                      
NCI equity share                 $ 60,668 $ 32,882  
Net loss attributed to non-controlling interests $ 3,871 $ 3,975 $ 3,911 $ 4,438 $ 3,039 $ 1,694 $ 243 $ 479 (16,195) (5,455) $ 0
Non-controlling interests in consolidated entities 44,473       27,427       44,473 27,427  
Avenue [Member]                      
Noncontrolling Interest [Line Items]                      
NCI equity share                 (494) 6  
Net loss attributed to non-controlling interests                 (349) (567)  
Non-controlling interests in consolidated entities (843)       (561)       (843) (561)  
Coronado SO Co, Inc [Member]                      
Noncontrolling Interest [Line Items]                      
NCI equity share                 (217) 23  
Net loss attributed to non-controlling interests                 (19) (240)  
Non-controlling interests in consolidated entities (236)       (217)       (236) (217)  
Mustang Therapeutics, Inc [Member]                      
Noncontrolling Interest [Line Items]                      
NCI equity share                 12,376 14  
Net loss attributed to non-controlling interests                 (1,805) (373)  
Non-controlling interests in consolidated entities 10,571       (359)       10,571 (359)  
Checkpoint Therapeutics, Inc [Member]                      
Noncontrolling Interest [Line Items]                      
NCI equity share                 32,160 32,760  
Net loss attributed to non-controlling interests                 (11,733) [1] (3,855)  
Non-controlling interests in consolidated entities 20,427       28,905       20,427 28,905  
JMC [Member]                      
Noncontrolling Interest [Line Items]                      
NCI equity share                 (192) 79  
Net loss attributed to non-controlling interests                 (355) (420)  
Non-controlling interests in consolidated entities (547)       $ (341)       (547) $ (341)  
Helocyte [Member]                      
Noncontrolling Interest [Line Items]                      
NCI equity share                 (612)    
Net loss attributed to non-controlling interests                 (1,155)    
Non-controlling interests in consolidated entities (1,767)               (1,767)    
Cellvation [Member]                      
Noncontrolling Interest [Line Items]                      
NCI equity share                 4    
Net loss attributed to non-controlling interests                 (158)    
Non-controlling interests in consolidated entities (154)               (154)    
National Holdings [Member]                      
Noncontrolling Interest [Line Items]                      
NCI equity share                 17,643    
Net loss attributed to non-controlling interests                 (621)    
Non-controlling interests in consolidated entities $ 17,022               $ 17,022    
[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.