Balance Sheet Components - Other Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Other Assets [Abstract]
Operating lease right-of-use asset	$ 24,075	$ 23,784
Deferred service costs, non-current	4,828	4,632
Restricted cash, non-current	1,613	1,607
Investment in auction rate security	1,571	1,571
Deposits	1,252	1,201
Non-marketable equity securities	128	128
Prepaid expense, non-current	1,706	1,576
Total other assets	$ 35,173	$ 34,499