Fortress Biotech, Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 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

Segment Information - Additional Information (Detail)

v3.8.0.1

Segment Information - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Accounts Receivable, Net				$ 5.2	$ 5.4
Customer Concentration Risk [Member] \| Sales Revenue, Net [Member]
Segment Reporting Information [Line Items]
Concentration Risk, Percentage			100.00%
Customer One [Member]
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Gross	$ 10.8	$ 1.9
Accounts Receivable, Net	1.9	1.1
Customer Two [Member]
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Gross	7.7	1.1
Accounts Receivable, Net	1.5	0.5
Customer Three [Member]
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Gross	5.4	$ 0.7
Accounts Receivable, Net	$ 0.9

- Definition

For an unclassified balance sheet, the amount due from customers or clients for goods or services that have been delivered or sold in the normal course of business, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

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