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

Organization and Description of Business (Details) (USD $)	0 Months Ended		1 Months Ended	9 Months Ended		75 Months Ended
	Aug. 28, 2012	Jun. 27, 2012	Jun. 27, 2012	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Dec. 31, 2011
Organization and Description of Business (Additional Textual) [Abstract]
Accumulated deficit				$ (75,519,000)		$ (75,519,000)	$ (56,574,000)
Net proceeds from public offering of Common Stock		26,400,000	264,000,000	28,750,000	80,000	28,948,000
Net proceeds from issuance of Term loan	14,700,000
Amount of term loan	$ 15,000,000
Common Stock [Member]
Organization and Description of Business (Textual) [Abstract]
Public offering of Common Stock, shares		5,750,000

The cash inflow from the additional capital contribution to the entity.

Number of new stock issued during the period.