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Balance Sheet Components - Other Assets (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Jun. 30, 2018
--- | --- | ---
Other Assets [Abstract] |  |
Deferred service costs, non-current | $ 3,473 | $ 3,583
Non-marketable equity securities | 2,878 |
Non-marketable equity securities |  | 3,539
Restricted cash included in other assets | 2,301 | 2,202
Investment in auction rate security | 1,571 | 1,571
Deposits | 607 | 671
Prepaid expense, non-current | 1,763 | 2,471
Total other assets | $ 12,593 | $ 14,037

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