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Balance Sheet Components - Product Warranty Accrual (Details) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]    
Beginning balance $ 709 $ 623
Additions 71 21
Utilization (73) (3)
Ending balance $ 707 $ 641