Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Additional Information (Details)

v3.20.4
Stockholders' Equity - Additional Information (Details) - USD ($)
 1 Months Ended 12 Months Ended
Feb. 22, 2021
Jan. 01, 2021
Jan. 01, 2020
Mar. 17, 2015
Sep. 30, 2020
Nov. 30, 2019
Dec. 31, 2020
Dec. 31, 2019
Nov. 30, 2020
Jun. 04, 2020
Nov. 30, 2017
Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Common Stock, Shares Authorized             95,000,000     95,000,000    
Common Stock, Increase in authorized shares (in shares)                   35,000,000    
Common Stock, Par or Stated Value Per Share             $ 0.0001 $ 0.0001   $ 0.0001    
Common Stock, Shares, Issued             62,420,439 47,004,764        
Common Stock, Shares, Outstanding             62,420,439 47,004,764        
Shelf Registration Statement, Maximum Authorized Securities                 $ 100,000,000   $ 100,000,000  
Percentage of annual equity fee       2.50%                
Gross proceeds from issue of shares               $ 8,000,000.0        
Issuance of common shares, net of offering costs - At-the-market offering             $ 12,393,000 7,813,000        
Issuance of common shares - Founders Agreement             901,000 $ 738,000        
Shelf registration statement remaining authorized securities             83,600,000          
Total unrecognized compensation cost related to non-vested             $ 2,800,000          
Non-vested Restricted Stock [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Weighted average period (in years)             1 year 10 months 24 days          
Performance Shares [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Restricted stock outstanding non-vested             333,334          
2015 Incentive Plan [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Number of shares available for issuance Authorized                       9,000,000
Plans expires (in years)             10 years          
Shares are available for issuance             4,288,465          
Common Shares [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Sale price per share             $ 2.50 $ 2.50        
Stock Issued During Period Shares Common Shares For At The Market Offering             5,104,234 2,273,189        
Stock Issued During Period Value Common Shares For At The Market Offering Gross             $ 12,800,000 $ 2,273,189,000,000        
Issuance of common shares, net of offering costs - At-the-market offering             0 0        
Issuance of common shares - Founders Agreement             $ 0 $ 0        
Underwritten Public Offering [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Number of shares sold         7,321,429 15,400,000            
Sale price per share $ 3.88       $ 2.80 $ 1.27   $ 3.52        
Gross proceeds from issue of shares $ 12,300,000       $ 20,500,000 $ 19,600,000            
Net proceeds from the offering 12,000,000.0       18,900,000 17,600,000   $ 7,800,000        
Underwriting discounts and offering expenses         $ 1,600,000 $ 2,000,000.0            
Stock Issued During Period Value Common Shares For At The Market Offering Gross $ 3,170,216                      
Fortress Biotech, Inc [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Number of shares sold   1,742,449 1,459,305       310,625 441,816        
Percentage of annual equity fee   2.50% 2.50%       2.50%          
Issuance of common shares - Founders Agreement             $ 901,000 $ 738,000        
Agent [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Commission rate                 3.00%   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