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Balance Sheet Components - Accrued liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017
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Balance Sheet Related Disclosures [Abstract] |  |  |  |
Accrued compensation and benefits | $ 19,968 | $ 16,385 |  |
Warranty accrual | 709 | 623 | $ 535 | $ 1,866
Stock rotation accrual | 3,358 | 1,921 | $ 1,750 | $ 1,871
Accrued professional fees | 5,868 | 1,721 |  |
Accrued inventory | 775 | 857 |  |
Accrued facilities related expenses | 1,831 | 4,233 |  |
Accrued financing lease costs | 0 | 728 |  |
Accrued property, plant and equipment | 11,039 | 11,527 |  |
Other accrued expenses | 8,017 | 5,144 |  |
Customer deposit | 2,813 | 351 |  |
ESPP payable | 608 | 585 |  |
Accrued liabilities | $ 54,986 | $ 44,075 |  |

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