Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details Textual)

v3.19.1
Stockholders' Equity (Details Textual) - USD ($)
3 Months Ended
Jan. 01, 2019
Mar. 31, 2019
Dec. 31, 2018
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, Par or Stated Value Per Share   $ 0.0001 $ 0.0001      
Common Stock, Shares, Issued   28,881,756 27,076,154      
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   $ 4,800,000        
Shelf Registration Statement, Maximum Authorized Securities       $ 100,000,000    
Shelf Registration Statement, Remaining Authorized Securities   68,600,000        
Stock Issued During Period Value Common Shares For At The Market Offering   $ 355,000        
Agent [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Commission rate   3.00%        
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   1,582,457        
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   9 months 18 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        
Fortress Biotech, Inc [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock Issued During Period, Shares, New Issues 960,428 2,254        
Equity Method Investment, Annual Equity Fee, Percentage 2.50%          
Common Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares Issued, Price Per Share   $ 4.05        
Stock Issued During Period Shares Common Shares For At The Market Offering   90,269        
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   $ 365,000        
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