Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Additional Information (Details)

v3.20.1
Stockholders' Equity - Additional Information (Details) - USD ($)
 1 Months Ended 12 Months Ended
Jan. 01, 2020
Jan. 01, 2019
Nov. 30, 2019
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Nov. 30, 2017
Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Common Stock, Shares Authorized         60,000,000 60,000,000    
Common Stock, Par or Stated Value Per Share         $ 0.0001 $ 0.0001    
Common Stock, Shares, Issued         47,004,764 27,076,154    
Common Stock, Shares, Outstanding         47,004,764 27,076,154    
Shelf Registration Statement, Maximum Authorized Securities             $ 100,000,000  
Stock Issued During Period Value Common Shares For At The Market Offering         $ 7,813,000 $ 7,747,000    
Stock Issued During Period, Value, Common Shares For Services         738,000 $ 815,000    
Shelf Registration Statement, Remaining Authorized Securities         41,400,000      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options         $ 2,800,000      
Non-vested Restricted Stock [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition         1 year 1 month 6 days      
Performance Shares [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number         333,334      
2015 Incentive Plan [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized               5,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period         10 years      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant         1,465,805      
Common Stock [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Shares Issued, Price Per Share         $ 3.52 $ 4.33    
Stock Issued During Period Shares Common Shares For At The Market Offering         2,273,189 1,841,774    
Stock Issued During Period Value Common Shares For At The Market Offering Gross         $ 8,000,000 $ 8,000,000    
Stock Issued During Period Value Common Shares For At The Market Offering         0 0    
Stock Issued During Period, Value, Common Shares For Services         $ 0 $ 0    
Underwritten Public Offering [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock Issued During Period, Shares, New Issues     15,400,000 5,290,000        
Shares Issued, Price Per Share     $ 1.27 $ 4.35        
Stock Issued During Period, Value, New Issues     $ 19,600,000 $ 23,000,000        
Proceeds from Issuance Underwritten Public Offering     17,600,000 20,800,000        
Payments of Stock Issuance Costs     $ 2,000,000 $ 2,200,000        
Fortress Biotech, Inc [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock Issued During Period, Shares, New Issues 1,459,305 960,428     441,816 178,292    
Equity Method Investment, Annual Equity Fee, Percentage 2.50% 2.50%            
Stock Issued During Period, Value, Common Shares For Services         $ 738,000 $ 815,000    
Agent [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Commission rate             3.00%  
Common Class A [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Common Stock, Shares Authorized         7,000,000      
Common Stock, Shares, Issued         7,000,000      
Common Stock, Shares, Outstanding         7,000,000