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Balance Sheet Components - Other Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Jul. 01, 2019 | Jun. 30, 2019
--- | --- | --- | ---
Other Assets [Abstract] |  |  |
Operating lease right-of-use asset | $ 12,568 | $ 14,800 |
Deferred service costs, non-current | 3,956 |  | $ 3,572
Restricted cash, non-current | 2,333 |  | 2,303
Investment in auction rate security | 1,571 |  | 1,571
Deposits | 565 |  | 686
Non-marketable equity securities | 128 |  | 878
Prepaid expense, non-current | 1,597 |  | 1,649
Total other assets | $ 22,718 |  | $ 10,659

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