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Commitments and Contingencies (Details) - USD ($)
1 Months Ended 6 Months Ended 12 Months Ended
Sep. 30, 2018
Jul. 31, 2017
Jun. 30, 2019
Dec. 31, 2015
Aug. 31, 2015
Asset Purchase Agreement [Member] | 1st Order Pharmaceuticals, Inc. and Bausch Health Companies Inc. [Member]          
Commitments and Contingencies [Line Items]          
Agreement terminated in exchange for a one-time payment $ 6,000,000        
Asset Purchase Agreement [Member] | 1st Order Pharmaceuticals, Inc. [Member]          
Commitments and Contingencies [Line Items]          
Royalty obligations     $ 0    
Asset Purchase Agreement [Member] | 1st Order Pharmaceuticals, Inc. [Member] | Clinical Development Milestones [Member]          
Commitments and Contingencies [Line Items]          
Future potential payments     500,000    
Asset Purchase Agreement [Member] | 1st Order Pharmaceuticals, Inc. [Member] | Regulatory Milestone [Member] | Maximum [Member]          
Commitments and Contingencies [Line Items]          
Future potential payments     6,000,000    
Asset Purchase Agreement [Member] | 1st Order Pharmaceuticals, Inc. [Member] | Other Milestones [Member]          
Commitments and Contingencies [Line Items]          
Future potential payments     $ 1,500,000    
License Agreement [Member] | Clinical Development Milestones [Member]          
Commitments and Contingencies [Line Items]          
Future potential payments   $ 2,000,000      
License Agreement [Member] | Regulatory Milestone [Member] | Maximum [Member]          
Commitments and Contingencies [Line Items]          
Future potential payments   $ 7,000,000      
Medpace Clinical Development Service Agreement [Member]          
Commitments and Contingencies [Line Items]          
Service agreement, term     5 years    
Committed service obligation         $ 7,000,000
Contractual obligation paid       $ 3,000,000