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Commitments and Contingencies (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Future minimum lease payments under the non-cancelable leases      
2020 $ 2,872    
2021 1,140    
Total future minimum lease payments 4,012    
Rent expense $ 2,700 $ 2,700 $ 2,500