Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - License Agreements (Details)

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Commitments and Contingencies - License Agreements (Details) - TMRC - USD ($)
1 Months Ended 3 Months Ended
Apr. 30, 2020
Sep. 30, 2016
May 31, 2016
Sep. 30, 2015
Mar. 31, 2020
Mar. 31, 2019
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]            
Up-front license fee       $ 1,000,000    
Payment of up-front license fee     $ 500,000 500,000    
Payments per indication due upon the successful achievement of clinical and regulatory milestones       $ 13,000,000    
Payments made upon achievement of development milestone   $ 1,000,000        
Fees incurred under supply management agreement         $ 300,000 $ 0
Fees paid under supply management agreement           $ 0
Subsequent Event            
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]            
Fees incurred under supply management agreement $ 500,000