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

Quarterly report pursuant to Section 13 or 15(d)

Market Capitalization Bonuses and Executive Officer Resignations and Agreements - Additional Information (Detail)

Market Capitalization Bonuses and Executive Officer Resignations and Agreements - Additional Information (Detail) (USD $)	3 Months Ended			9 Months Ended	3 Months Ended
	Jun. 30, 2013 Executive Officer Resignations [Member]	Sep. 30, 2013 Dr. Sandage [Member] Executive Officer Resignations [Member]	Sep. 30, 2013 Dr. Glenn Cooper [Member] Executive Officer Resignations [Member]	Sep. 30, 2013 Dr. Sandage and Dr. Cooper [Member] Executive Officer Resignations [Member]	Jun. 30, 2013 Market Capitalization Bonuses [Member]	Mar. 31, 2013 Market Capitalization Bonuses [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Market capitalization bonus					$ 312,500	$ 231,250
Market capitalization					250,000,000	125,000,000
Minimum share volume per day					100,000	50,000
Trading volume period					30 days	30 days
Severance costs	445,000
Severance obligation paid		$ 107,000	$ 94,900	$ 446,200

- Definition

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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