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)

v2.4.1.9

Debt and Interest- Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Debt [Line Items]
Interest Expense, Debt	$ 300,000us-gaap_InterestExpenseDebt	$ 1,000,000us-gaap_InterestExpenseDebt
IDB Promissory Note Payable [Member]
Debt [Line Items]
Interest Expense, Debt	71,300	42,000
Amortization of Debt Discount (Premium)	1,000
Long-term Debt, Gross	14,000,000	14,000,000
Notes Payable	14,000,000
Debt Instrument, Maturity Date, Description	February 2017
Hercules Note Payble [Member]
Debt [Line Items]
Interest Expense, Debt		800,000
Accretion of Discount		400,000
Amortization of Debt Discount (Premium)		44,000
NSC Notes Payable [Member]
Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	8.00%
Debt Instrument, Fee Amount	900,000
Interest Expense, Debt	72,300
Amortization of Debt Discount (Premium)	20,000
Notes Payable	$ 10,000,000
Debt Instrument, Maturity Date, Description	Mar - 2018
Sale of Stock, Percentage of Ownership after Transaction	25.00%
NSC [Member]
Debt [Line Items]
Debt Instrument, Term	10 years

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Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of passage of time.

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Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

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Contractual interest rate for funds borrowed, under the debt agreement.

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