Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Details)

v3.20.2
Stockholders' Equity - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Jun. 04, 2020
Sep. 30, 2020
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Jan. 01, 2020
Dec. 31, 2019
Nov. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Common Stock, Shares Authorized 95,000,000 95,000,000 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   $ 0.0001     $ 0.0001  
Common Stock, Shares, Issued   60,883,303 60,883,303   60,883,303     47,004,764  
Common Stock, Shares, Outstanding   60,883,303 60,883,303   60,883,303     47,004,764  
Shelf Registration Statement, Maximum Authorized Securities                 $ 100,000,000
Net proceeds of commissions and other transaction costs     $ 5,813,000 $ 3,341,000 $ 8,417,000 $ 7,709,000      
Issuance of common shares - Founders Agreement     731,000 92,000 797,000 198,000      
Shelf registration statement remaining authorized securities   $ 12,300,000 12,300,000   12,300,000        
Amount received for issuance of common stock upon exercise of warrants       $ 0 13,000 $ 0      
Non-vested Restricted Stock [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Total unrecognized compensation cost related to non-vested   $ 3,500,000 $ 3,500,000   $ 3,500,000        
Weighted average period (in years)         2 years        
Performance Shares [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Restricted stock outstanding non-vested   333,334 333,334   333,334        
Options [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of outstanding stock options vested and exercisable   0 0   0        
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 9,000,000   9,000,000        
Plans expires (in years)     10 years            
Shares are available for issuance   4,298,465 4,298,465   4,298,465        
Common Shares [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Sale price per share   $ 2.40 $ 2.40   $ 2.40        
Stock Issued During Period Shares Common Shares For At The Market Offering     2,311,062 1,142,298 3,614,344 2,230,524      
Stock Issued During Period Value Common Shares For At The Market Offering Gross         $ 8,700,000        
Net proceeds of commissions and other transaction costs     $ 0 $ 0 0 $ 0      
Issuance of common shares - Founders Agreement     $ 0 $ 0 $ 0 $ 0      
Issuance of stock upon exercise of warrants       26,146 102,742 73,525      
Amount received for issuance of common stock upon exercise of warrants       $ 0 $ 0 $ 0      
Underwritten Public Offering [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of shares sold   7,321,429     7,321,429        
Sale price per share   $ 2.80 $ 2.80   $ 2.80        
Gross proceeds from issue of shares   $ 20,500,000     $ 20,500,000        
Net proceeds from the offering   18,900,000     18,900,000        
Underwriting discounts and offering expenses   $ 1,600,000     $ 1,600,000        
Fortress Biotech, Inc [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of shares sold 1,459,305       273,379        
Percentage of annual equity fee   2.50% 2.50%   2.50%   2.50%    
Issuance of common shares - Founders Agreement     $ 797,000   $ 797,000        
Agent [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Commission rate   3.00% 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 7,000,000   7,000,000