Balance Sheet Components - Other Long-Term Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019
Other Long-term Liabilities [Abstract]
Operating lease liability, non-current	$ 17,892	$ 18,102
Accrued unrecognized tax benefits including related interest and penalties	16,067	15,496
Accrued warranty costs, non-current	2,670	2,395	$ 2,630
Others	8,078	6,002
Total other long-term liabilities	$ 44,707	$ 41,995