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Subsequent Events (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended
Aug. 01, 2020
Jul. 31, 2020
Jun. 30, 2020
Jun. 30, 2019
Subsequent Event [Line Items]        
Proceeds from related party debt financing     $ 80,000 $ 0
Sumitomo Dainippon Pharma Co., Ltd. | Letter Agreement with Sumitomo Dainippon Pharma, Co., Ltd. | Term Loan | Majority Shareholder | Subsequent Event        
Subsequent Event [Line Items]        
Proceeds from related party debt financing   $ 60,000    
Available borrowing capacity   $ 146,300    
Sunovion Pharmaceuticals Inc. [Member] | Majority Shareholder | Subsequent Event        
Subsequent Event [Line Items]        
Agreement term 3 years      
Agreement extension term 1 year      
Agreement termination notice term 9 months