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Leases - Additional Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2018
Aug. 31, 2017
Lessee, Lease, Description [Line Items]        
Operating lease cost $ 3,300      
Weighted average remaining operating lease term 3 years      
Weighted average discount rate 5.00%      
Cash payments included in measurement of operating lease liabilities $ 3,700      
Reversal of deferred rent 0 $ (360) $ (1,193)  
Tenant improvement allowance recognition due to lease termination $ 0 $ 0 582  
Avaya Sublease        
Lessee, Lease, Description [Line Items]        
Renewal term (in years)       3 years
Reversal of deferred rent     538  
Tenant improvement allowance recognition due to lease termination     $ 582