Annual report pursuant to Section 13 and 15(d)

Significant Accounting Policies (Details Textual)

v3.19.1
Significant Accounting Policies (Details Textual) - USD ($)
 1 Months Ended 12 Months Ended
Jan. 01, 2019
Mar. 13, 2018
Mar. 12, 2018
Mar. 13, 2017
Jan. 31, 2019
Aug. 31, 2017
Jul. 31, 2016
Dec. 31, 2018
Dec. 31, 2017
Property Plant And Equipment Design Costs Capitalized               $ 400,000  
Certificates of Deposit, at Carrying Value               $ 27,600,000 $ 40,000,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent               21.00% 35.00%
Preferred Stock, Dividend Rate, Percentage         2.00%        
Subsequent Event [Member] | Accounting Standards Update 2016-02 [Member]                  
Additional Operating Lease Liability $ 1.9                
Scenario, Plan [Member]                  
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent                 21.00%
Held-to-maturity Securities [Member]                  
Time Deposits, at Carrying Value               $ 17,600,000 $ 26,000,000
Cash and Cash Equivalents [Member]                  
Time Deposits, at Carrying Value               $ 10,000,000 14,000,000
Fortress Biotech, Inc [Member]                  
Research and Development Asset Acquired Other than Through Business Combination, Fair Value Acquired                 $ 9,600,000
Stock Issued During Period, Shares, Issued for Services 709,314     767,264          
Preferred Stock, Dividend Rate, Percentage 2.00% 2.50% 2.50%     2.50%      
Fortress Biotech, Inc [Member] | Subsequent Event [Member]                  
Stock Issued During Period, Shares, Issued for Services 709,314                
Series A Preferred Stock [Member]                  
Stock Issued During Period, Shares, Issued for Services             250,000    
Series A Preferred Stock [Member] | Fortress Biotech, Inc [Member]                  
Preferred Stock, Dividend Rate, Percentage             2.50%