Annual report pursuant to Section 13 and 15(d)

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

v3.19.1
Non-Controlling Interests - Summary Of Non-controlling Interests in Consolidated Entities (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Noncontrolling Interest [Line Items]                    
NCI equity share                 $ 75,680 $ 100,889
Net loss attributed to non-controlling interests $ 14,535 $ 11,949 $ 14,105 $ 17,200 $ 15,605 $ 9,191 $ 5,584 $ 2,580 (57,789) (32,960)
Non-controlling interests in consolidated entities 17,891       67,929       17,891 67,929
Aevitas [Member]                    
Noncontrolling Interest [Line Items]                    
NCI equity share                 (474) (126)
Net loss attributed to non-controlling interests                 (606) (168)
Non-controlling interests in consolidated entities $ (1,080)       $ (294)       $ (1,080) $ (294)
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 36.10%       35.40%       36.10% 35.40%
Avenue [Member]                    
Noncontrolling Interest [Line Items]                    
NCI equity share                 $ 13,326 [1] $ 17,454 [2]
Net loss attributed to non-controlling interests                 (13,735) [1] (4,646) [2]
Non-controlling interests in consolidated entities $ (409) [1]       $ 12,808 [2]       $ (409) [1] $ 12,808 [2]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 64.81% [1]       66.10% [2]       64.81% [1] 66.10% [2]
Caelum [Member]                    
Noncontrolling Interest [Line Items]                    
NCI equity share                 $ (2,436) $ (815)
Net loss attributed to non-controlling interests                 (2,413) (1,262)
Non-controlling interests in consolidated entities $ (4,849)       $ (2,077)       $ (4,849) $ (2,077)
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 36.80%       34.70%       36.80% 34.70%
Cellvation [Member]                    
Noncontrolling Interest [Line Items]                    
NCI equity share                 $ (457) $ (259)
Net loss attributed to non-controlling interests                 (185) (96)
Non-controlling interests in consolidated entities $ (642)       $ (355)       $ (642) $ (355)
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 21.10%       21.50%       21.10% 21.50%
Checkpoint Therapeutics, Inc [Member]                    
Noncontrolling Interest [Line Items]                    
NCI equity share [1]                 $ 31,648 $ 21,635
Net loss attributed to non-controlling interests [1]                 (23,470) (12,314)
Non-controlling interests in consolidated entities [1] $ 8,178       $ 9,321       $ 8,178 $ 9,321
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners [1] 69.30%       62.00%       69.30% 62.00%
Coronado SO Co, Inc [Member]                    
Noncontrolling Interest [Line Items]                    
NCI equity share                 $ (290) $ (236)
Net loss attributed to non-controlling interests                 0 (54)
Non-controlling interests in consolidated entities $ (290)       $ (290)       $ (290) $ (290)
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 13.00%       13.00%       13.00% 13.00%
Cyprium [Member]                    
Noncontrolling Interest [Line Items]                    
NCI equity share                 $ (210) $ (143)
Net loss attributed to non-controlling interests                 (62) (15)
Non-controlling interests in consolidated entities $ (272)       $ (158)       $ (272) $ (158)
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 10.80%       11.10%       10.80% 11.10%
Helocyte [Member]                    
Noncontrolling Interest [Line Items]                    
NCI equity share                 $ (3,372) $ (1,907)
Net loss attributed to non-controlling interests                 (684) (1,193)
Non-controlling interests in consolidated entities $ (4,056)       $ (3,100)       $ (4,056) $ (3,100)
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 19.80%       20.00%       19.80% 20.00%
JMC [Member]                    
Noncontrolling Interest [Line Items]                    
NCI equity share                 $ (475) $ (469)
Net loss attributed to non-controlling interests                 245 7
Non-controlling interests in consolidated entities $ (230)       $ (462)       $ (230) $ (462)
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 6.90%       6.30%       6.90% 6.30%
Mustang Therapeutics, Inc [Member]                    
Noncontrolling Interest [Line Items]                    
NCI equity share                 $ 38,631 [1] $ 48,740 [2]
Net loss attributed to non-controlling interests                 (16,628) [1] (11,911) [2]
Non-controlling interests in consolidated entities $ 22,003 [1]       $ 36,829 [2]       $ 22,003 [1] $ 36,829 [2]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 60.50% [1]       61.60% [2]       60.50% [1] 61.60% [2]
National Holdings [Member]                    
Noncontrolling Interest [Line Items]                    
NCI equity share                   $ 17,021
Net loss attributed to non-controlling interests                   (1,216)
Non-controlling interests in consolidated entities         $ 15,805         $ 15,805
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners         43.40%         43.40%
Tamid [Member]                    
Noncontrolling Interest [Line Items]                    
NCI equity share                 $ (211) $ (6)
Net loss attributed to non-controlling interests                 (251) (92)
Non-controlling interests in consolidated entities $ (462)       $ (98)       $ (462) $ (98)
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 23.40%       24.00%       23.40% 24.00%
[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.
[2] Avenue and Mustang are consolidated with Fortress’ operations because Fortress maintains voting control through its ownership of Preferred Class A Shares which provide super-majority voting rights.