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Summary of Significant Accounting Policies - Property Plant and Equipment (Details) - USD ($)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Property, Plant and Equipment    
Impairment of property, plant and equipment $ 0 $ 43,000
Office equipment    
Property, Plant and Equipment    
Property, plant and equipment (useful life) 3 years  
Lab equipment    
Property, Plant and Equipment    
Property, plant and equipment (useful life) 5 years  
Furniture and fixtures    
Property, Plant and Equipment    
Property, plant and equipment (useful life) 5 years