Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details Textual)

v3.10.0.1
Stockholders' Equity (Details Textual) - USD ($)
 1 Months Ended 9 Months Ended
Mar. 31, 2018
Jan. 02, 2018
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Nov. 30, 2017
Jun. 30, 2017
Mar. 17, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Common Stock, Shares Authorized     60,000,000   60,000,000      
Common Stock, Shares, Issued     26,996,238   18,512,429      
Equity Method Investment, Annual Equity Fee, Percentage   2.50%           2.50%
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options     $ 3,400,000          
Shelf Registration Statement, Maximum Authorized Securities           $ 100,000,000    
Shelf Registration Statement, Remaining Authorized Securities     69,000,000          
Payments of Stock Issuance Costs     2,184,000 $ 0        
Stock Issued During Period, Value, Common Shares For Services     815,000          
Stock Issued During Period Value Common Shares For At The Market Offering     $ 7,747,000          
National Securities Corporation [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Payments of Stock Issuance Costs $ 1,800,000              
Agent [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Commission rate     3.00%          
Underwritten Public Offering [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock Issued During Period, Value, New Issues $ 23,000,000              
Shares Issued, Price Per Share $ 4.35              
Stock Issued During Period, Shares, New Issues 5,290,000              
Proceeds from Issuance Underwritten Public Offering $ 20,800,000              
Payments of Stock Issuance Costs $ 2,200,000              
Non employee [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     661,178          
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 Available for Grant     2,395,457          
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 Authorized             5,000,000  
Non-vested Resricted 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 6 months          
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          
Fortress Biotech, Inc [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock Issued During Period, Shares, New Issues   591,836            
Equity Method Investment, Annual Equity Fee, Percentage         2.50%      
Stock Issued During Period, Value, Common Shares For Services     $ 815,000          
Stock Issued During Period, Shares, Common Shares For Services     178,292          
Common Stock [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Shares Issued, Price Per Share     $ 4.33          
Stock Issued During Period, Value, Common Shares For Services     $ 0          
Stock Issued During Period, Shares, Common Shares For Services     770,128          
Stock Issued During Period Shares Common Shares For At The Market Offering     1,841,774          
Stock Issued During Period Value Common Shares For At The Market Offering     $ 0          
Stock Issued During Period Value Common Shares For At The Market Offering Gross     $ 8,000,000          
Common Class A [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Common Stock, Shares Authorized 15,000,000   7,000,000          
Common Stock, Shares, Issued     7,000,000   7,000,000