Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions - Schedule of The Effective Date and Annual Management Services agreement Fee (Income) Expense (Detail)

v3.7.0.1
Related Party Transactions - Schedule of The Effective Date and Annual Management Services agreement Fee (Income) Expense (Detail)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
USD ($)
Annual Management Services Agreement Fee Income Expense $ 0
Research and Development Expense [Member]  
Annual Management Services Agreement Fee Income Expense 0
Selling, General and Administrative Expenses [Member]  
Annual Management Services Agreement Fee Income Expense 0
Helocyte Inc [Member]  
Annual Management Services Agreement Fee Income Expense $ 500
Annual Consulting Fee Payable Effective Date Mar. 20, 2015
Helocyte Inc [Member] | Research and Development Expense [Member]  
Annual Management Services Agreement Fee Income Expense $ 250
Helocyte Inc [Member] | Selling, General and Administrative Expenses [Member]  
Annual Management Services Agreement Fee Income Expense 250
Avenue Therapeutics, Inc. [Member]  
Annual Management Services Agreement Fee Income Expense $ 500
Annual Consulting Fee Payable Effective Date Feb. 17, 2015
Avenue Therapeutics, Inc. [Member] | Research and Development Expense [Member]  
Annual Management Services Agreement Fee Income Expense $ 250
Avenue Therapeutics, Inc. [Member] | Selling, General and Administrative Expenses [Member]  
Annual Management Services Agreement Fee Income Expense 250
Mustang Bio, Inc [Member]  
Annual Management Services Agreement Fee Income Expense $ 500
Annual Consulting Fee Payable Effective Date Mar. 13, 2015
Mustang Bio, Inc [Member] | Research and Development Expense [Member]  
Annual Management Services Agreement Fee Income Expense $ 250
Mustang Bio, Inc [Member] | Selling, General and Administrative Expenses [Member]  
Annual Management Services Agreement Fee Income Expense 250
Checkpoint Therapeutics, Inc [Member]  
Annual Management Services Agreement Fee Income Expense $ 500
Annual Consulting Fee Payable Effective Date Mar. 17, 2015
Checkpoint Therapeutics, Inc [Member] | Research and Development Expense [Member]  
Annual Management Services Agreement Fee Income Expense $ 250
Checkpoint Therapeutics, Inc [Member] | Selling, General and Administrative Expenses [Member]  
Annual Management Services Agreement Fee Income Expense 250
Cellvation Inc [Member]  
Annual Management Services Agreement Fee Income Expense $ 500
Annual Consulting Fee Payable Effective Date Oct. 31, 2016
Cellvation Inc [Member] | Research and Development Expense [Member]  
Annual Management Services Agreement Fee Income Expense $ 250
Cellvation Inc [Member] | Selling, General and Administrative Expenses [Member]  
Annual Management Services Agreement Fee Income Expense 250
Caelum Biosciences, Inc. [Member]  
Annual Management Services Agreement Fee Income Expense $ 500
Annual Consulting Fee Payable Effective Date Jan. 01, 2017
Caelum Biosciences, Inc. [Member] | Research and Development Expense [Member]  
Annual Management Services Agreement Fee Income Expense $ 250
Caelum Biosciences, Inc. [Member] | Selling, General and Administrative Expenses [Member]  
Annual Management Services Agreement Fee Income Expense 250
Cyprium Biosciences, Inc [Member]  
Annual Management Services Agreement Fee Income Expense $ 500
Annual Consulting Fee Payable Effective Date Mar. 13, 2017
Cyprium Biosciences, Inc [Member] | Research and Development Expense [Member]  
Annual Management Services Agreement Fee Income Expense $ 250
Cyprium Biosciences, Inc [Member] | Selling, General and Administrative Expenses [Member]  
Annual Management Services Agreement Fee Income Expense 250
Fortress Biotech Inc [Member]  
Annual Management Services Agreement Fee Income Expense (3,500)
Fortress Biotech Inc [Member] | Research and Development Expense [Member]  
Annual Management Services Agreement Fee Income Expense (1,750)
Fortress Biotech Inc [Member] | Selling, General and Administrative Expenses [Member]  
Annual Management Services Agreement Fee Income Expense $ (1,750)