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Balance Sheet Components - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Jun. 30, 2018
--- | --- | ---
Prepaid Expense and Other Assets, Current [Abstract] |  |
Receivables from vendors | $ 60,741 | $ 93,003
Restricted cash | 17,234 | 2,803
Prepaid expenses | 7,578 | 6,321
Deferred service costs | 3,354 | 2,920
Others | 8,950 | 5,809
Total prepaid expenses and other current assets | 97,857 | 110,856
Receivables from contract manufacturers, buy-sell arrangement | $ 59,700 | $ 87,400

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