Annual report pursuant to Section 13 and 15(d)

Related Party Transactions - Schedule of dividend or equity fee recorded by the Company (Detail)

v3.20.1
Related Party Transactions - Schedule of dividend or equity fee recorded by the Company (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dividends Payable, Current $ 0 $ 0
Aevitas Inc [Member]    
Dividends Payable Date Of Record Description January 1  
Dividends Payable, Current $ 6 6
Caelum Bio sciences Inc [Member]    
Dividends Payable Date Of Record Description January 1  
Dividends Payable, Current $ 0 462
Cellvation Inc [Member]    
Dividends Payable Date Of Record Description January 1  
Dividends Payable, Current $ 7 5
Checkpoint [Member]    
Dividends Payable Date Of Record Description January 1  
Dividends Payable, Current $ 2,510 1,748
Cyprium Bio sciences Inc [Member]    
Dividends Payable Date Of Record Description January 1  
Dividends Payable, Current $ 5 3
Helocyte Inc [Member]    
Dividends Payable Date Of Record Description January 1  
Dividends Payable, Current $ 131 167
Mustang Bio, Inc [Member]    
Dividends Payable Date Of Record Description January 1  
Dividends Payable, Current $ 4,923 2,085
Tamid [Member]    
Dividends Payable Date Of Record Description January 1  
Dividends Payable, Current $ 7 15
Fortress Biotech Inc [Member]    
Dividends Payable, Current $ (7,589) $ (4,491)