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Revenue Recognition - Revenue Associated With The Following license agreements (Detail) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Recognized Revenue Associated with The Following License Agreements [Line Items]    
Revenues $ 1,157 $ 488
KKC License Agreement [Member]    
Recognized Revenue Associated with The Following License Agreements [Line Items]    
Revenues 797  
Helsinn License Agreement [Member]    
Recognized Revenue Associated with The Following License Agreements [Line Items]    
Revenues $ 360 $ 488