Annual report pursuant to Section 13 and 15(d)

Significant Accounting Policies - Additional Information (Details)

v3.20.1
Significant Accounting Policies - Additional Information (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Jun. 26, 2017
Sep. 30, 2016
Dec. 31, 2018
Dec. 31, 2017
Stockholders' Equity, Reverse Stock Split presented to reflect the 3.0-to-1.0 reverse stock split.      
Stock Issued During Period, Shares, New Issues   250,000    
Preferred Stock, Dividend Rate, Percentage   2.50%    
Fortress Biotech, Inc [Member]        
Research and Development in Process     $ 0.0 $ 1.1