Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies - Additional Information (Details)

v3.20.2
Significant Accounting Policies - Additional Information (Details) - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended
Jun. 04, 2020
Sep. 30, 2020
Dec. 31, 2019
Jan. 01, 2020
Mar. 17, 2015
Equity Method Investment, Annual Equity Fee, Percentage         2.50%
Fortress Biotech, Inc [Member]          
Equity Method Investment, Annual Equity Fee, Percentage       2.50%  
Stock Issued During Period, Shares, New Issues 1,459,305 273,379      
Research and development [Member]          
Stock Issued During Period, Value, Issued for Services     $ 2.5