Mustang Bio, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Notes Payable (Details Textual)

Notes Payable (Details Textual) - USD ($)		1 Months Ended		3 Months Ended		7 Months Ended	9 Months Ended
Notes Payable (Details Textual) - USD ($)	Mar. 02, 2015	Jul. 05, 2016	Jul. 29, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Debt Instrument [Line Items]
Percentage Of Warrants Issued On Outstanding Note Amount			25.00%
Class of Warrants Or Rights Issued, Warrants Term			10 years
Notes Payable, Related Parties, Current				$ 2,001,000			$ 2,001,000		$ 3,571,000
Interest Expense, Debt				156,000	$ 0	$ 0	156,000
Amortization of Debt Discount (Premium)						$ 0	90,000
Debt Instrument, Unamortized Discount				$ (673,000)			$ (673,000)		$ 0
Working Capital Promissory Note [Member] \| Fortress Biotech, Inc [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage				8.00%			8.00%
Notes Payable, Related Parties, Current				$ 2,000,000			$ 2,000,000
Interest Expense, Debt				$ 42,000	$ 58,000		216,000	$ 99,000
National Securities Corporation Note [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		8.00%
Interest Expense, Debt							69,000
Percentage Of Contingently Issuable Warrants On Indebtedness Transferred		25.00%
Debt Instrument, Face Amount		$ 3,600,000
Debt Related Commitment Fees and Debt Issuance Costs		$ 129,000
Amortization of Debt Discount (Premium)							$ 90,000
Debt Instrument, Interest Rate, Effective Percentage		23.10%
Debt Instrument, Unamortized Discount		$ 634,000
National Securities Corporation Note [Member] \| Fortress Biotech, Inc [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Debt	$ 10,000,000
Debt Instrument, Maturity Date, Description	TheNSC Notematures in 36 months, provided that during the first 24 months Fortress can extend the maturity date by six months. No principal amount will be due for the first 24 months (or the first 30 months if the maturity date is extended). Thereafter, the NSC Note will be repaid at the rate of 1/12 of the principal amount per month for a period of 12 months. Interest on the note is 8% payable quarterly during the first 24 months (or the first 30 months if the note is extended) and monthly during the last 12 months.