Quarterly report pursuant to Section 13 or 15(d)

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

v3.7.0.1
Non-Controlling Interests - Summary Of Non-controlling Interests in Consolidated Entities (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Noncontrolling Interest [Line Items]      
NCI equity share $ 81,151   $ 60,668
Net loss attributed to non-controlling interests (2,580) $ (4,438) (16,195)
Non-controlling interests in consolidated entities 78,571   44,473
Avenue [Member]      
Noncontrolling Interest [Line Items]      
NCI equity share (842)   (494)
Net loss attributed to non-controlling interests (68) (108) (349)
Non-controlling interests in consolidated entities (910)   (843)
Coronado SO Co, Inc [Member]      
Noncontrolling Interest [Line Items]      
NCI equity share (236)   (217)
Net loss attributed to non-controlling interests (4) (5) (19)
Non-controlling interests in consolidated entities (240)   (236)
Mustang Therapeutics, Inc [Member]      
Noncontrolling Interest [Line Items]      
NCI equity share 46,581   12,376
Net loss attributed to non-controlling interests (1,674) [1] (70) (1,805)
Non-controlling interests in consolidated entities 44,907   10,571
Checkpoint Therapeutics, Inc [Member]      
Noncontrolling Interest [Line Items]      
NCI equity share 21,009   32,160
Net loss attributed to non-controlling interests (2,734) [2] (4,037) (11,733)
Non-controlling interests in consolidated entities 18,275   20,427
JMC [Member]      
Noncontrolling Interest [Line Items]      
NCI equity share (543)   (192)
Net loss attributed to non-controlling interests (68) (121) (355)
Non-controlling interests in consolidated entities (611)   (547)
Helocyte [Member]      
Noncontrolling Interest [Line Items]      
NCI equity share (1,684)   (612)
Net loss attributed to non-controlling interests (323) $ (97) (1,155)
Non-controlling interests in consolidated entities (2,007)   (1,767)
Cellvation [Member]      
Noncontrolling Interest [Line Items]      
NCI equity share (153)   4
Net loss attributed to non-controlling interests (54)   (158)
Non-controlling interests in consolidated entities (207)   (154)
Caelum [Member]      
Noncontrolling Interest [Line Items]      
NCI equity share (3)    
Net loss attributed to non-controlling interests (145)    
Non-controlling interests in consolidated entities (148)    
National Holdings [Member]      
Noncontrolling Interest [Line Items]      
NCI equity share 17,022   17,643
Net loss attributed to non-controlling interests 2,490   (621)
Non-controlling interests in consolidated entities $ 19,512   $ 17,022
[1] Mustang is consolidated with Fortress’s operations because Fortress maintains voting control through its ownership of Mustang’s Class A preferred shares which provide super-majority voting rights.
[2] Checkpoint is consolidated with Fortress’s operations because Fortress maintains voting control through its ownership of Checkpoint’s Class A common shares which provide for super-majority voting rights.