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Balance Sheet Components - Stock Rotation Accrual (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Stock Rotation Accrual Increae (Decrease) [Roll Forward]      
Beginning balance $ 1,750 $ 1,871 $ 1,988
Addition 5,267 2,714 4,819
Utilization (5,096) (2,835) (4,936)
Ending balance $ 1,921 $ 1,750 $ 1,871