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Balance Sheet Components - Product Warranty Accrual (Details) - USD ($)
$ in Thousands
9 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]    
Beginning balance $ 623 $ 535
Additions 852 189
Utilization (803) (69)
Ending balance $ 672 $ 655