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Sinovant and Sunovion License Agreements (Details)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Mar. 31, 2018
USD ($)
Jun. 30, 2020
USD ($)
item
Sep. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
Mar. 31, 2019
USD ($)
Jun. 30, 2020
USD ($)
item
Jun. 30, 2019
USD ($)
Jul. 10, 2020
USD ($)
License Agreement                
Revenue accounted for under Topic 606   $ 487   $ 525   $ 1,276 $ 2,228  
Collaboration revenue - Upfront payment                
License Agreement                
Revenue accounted for under Topic 606   (48)       108    
Collaboration revenue - Variable consideration                
License Agreement                
Revenue accounted for under Topic 606   7       152 $ 1,000  
Sunovion Pharmaceutics Canada, Inc. | Collaboration revenue - Upfront payment                
License Agreement                
Revenue not accounted for under Topic 606           $ 1,000    
License Agreement | Sinovant Sciences, LTD                
License Agreement                
Notice period for termination of agreement           180 days    
License Agreement | Sinovant Sciences, LTD | Achievement of certain regulatory and commercial milestones                
License Agreement                
Maximum contingent milestone payment   91,500       $ 91,500    
License Agreement | Sinovant Sciences, LTD | Subsequent regulatory approval                
License Agreement                
Maximum contingent milestone payment   4,000       4,000    
License Agreement | Sinovant Sciences, LTD | Clinical trial application submission                
License Agreement                
Proceeds from license agreement, milestone         $ 1,500      
License Agreement | Sinovant Sciences, LTD | FDA approval                
License Agreement                
Revenue accounted for under Topic 606     $ 5,000          
License Agreement | Sinovant Sciences, LTD | Additional regulatory approvals and annual sales targets                
License Agreement                
Remaining milestone payments   $ 86,500       $ 86,500    
License Agreement | Sinovant Sciences, LTD | Collaboration revenue - Upfront payment                
License Agreement                
Revenue accounted for under Topic 606 $ 5,000              
License Agreement | Sunovion Pharmaceutics Canada, Inc.                
License Agreement                
Number of deliverables | item   2       2    
License agreement regulatory milestone payment receivable               $ 500