Fortress Biotech, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Cover
- Document And Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Debt and Interest- Additional Information (Detail)

v3.7.0.1

Debt and Interest- Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Feb. 13, 2014
Debt [Line Items]
Debt discount recorded	$ 2,549,000	$ 2,009,000
Notes Payable	33,026,000	$ 28,215,000
Israel Discount Bank Of New York [Member]
Debt [Line Items]
Debt Instrument, Face Amount			$ 15,000,000
Notes Payable	14,900,000
Debt Instrument, Collateral Amount	15,000,000
Opus Credit Facility [Member]
Debt [Line Items]
Class Of Warrant Or Right Discount On Warrant	1,800,000
Warrants and Rights Outstanding	$ 9,000,000
NSC 2017 Note [Member]
Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	8.00%
Debt discount recorded	$ 200,000
Debt Instrument, Face Amount	$ 3,250,000
Debt Instrument, Maturity Date, Description	Each Note is due on the third anniversary of its issuance, provided that the Company may extend the maturity date for two one-year periods in its sole discretion.
Paid-in-Kind Interest,Percentage	7.00%
Line of Credit Facility, Current Borrowing Capacity	$ 50,000,000
Percentage Of Placement Agent Fee	10.00%
Warrants on Sale Price of Note,Percentage	10.00%
Proceeds from Fees Received	$ 325,400
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	87,946
NSC 2017 Note [Member] \| Minimum [Member]
Debt [Line Items]
Debt Instrument, Face Amount	$ 3,000,000
NSC 2017 Note [Member] \| Maximum [Member]
Debt [Line Items]
Debt Instrument, Face Amount	$ 40,000,000

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