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Balance Sheet Components - Accrued liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
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Balance Sheet Related Disclosures [Abstract] |  |  |  |
Accrued compensation and benefits | $ 16,385 | $ 18,484 |  |
Warranty accrual | 623 | 535 | $ 1,866 | $ 1,495
Stock rotation accrual | 1,921 | 1,750 | $ 1,871 | $ 1,988
Accrued professional fees | 1,721 | 1,922 |  |
Accrued inventory | 857 | 667 |  |
Accrued facilities related expenses | 4,233 | 2,163 |  |
Accrued financing lease costs | 728 | 1,510 |  |
Accrued property, plant and equipment | 11,527 | 18,145 |  |
Other accrued expenses | 6,080 | 4,665 |  |
Accrued liabilities | $ 44,075 | $ 49,841 |  |

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