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Merger - Contingent Value Rights Agreement (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2020
Jul. 23, 2019
Merger Agreement    
Percentage of gross consideration 80.00%  
Contingent value rights term 15 years  
Contingent value rights term incase of other than grant, sale or transfer 10 years  
Commitment to support develop gemcabene $ 1.0  
License Agreement with Beijing SL    
Merger Agreement    
Upfront payment to be received   $ 2.5