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Balance Sheet Components (Tables) | 12 Months Ended
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Jun. 30, 2020
Balance Sheet Related Disclosures [Abstract] |
Schedule of Accounts, Notes, Loans and Financing Receivable | Accounts receivable, net
| June 30,
| 2020 |  | 2019
| (in thousands)
Accounts receivable | $ | 43,394 |  |  | $ | 48,401 |
Less: Allowance for price adjustments | (30,092 | ) |  | (24,075 | )
Less: Allowance for doubtful accounts | (30 | ) |  | (30 | )
Accounts receivable, net | $ | 13,272 |  |  | $ | 24,296 |
Schedule of Inventory, Current | Inventories
| June 30,
| 2020 |  | 2019
| (in thousands)
Raw materials | $ | 55,377 |  |  | $ | 59,076 |
Work in-process | 61,863 |  |  | 38,214 |
Finished goods | 18,288 |  |  | 14,353 |
| $ | 135,528 |  |  | $ | 111,643 |
Schedule of Other Current Assets | Other current assets
| June 30,
| 2020 |  | 2019
| (in thousands)
VAT receivable | $ | 1,639 |  | * | $ | 30,769 |
Other prepaid expenses | 1,900 |  |  | 2,745 |
Prepaid insurance | 1,520 |  |  | 939 |
Prepaid maintenance | 587 |  |  | 481 |
Prepayments to supplier | 938 |  |  | 583 |
Prepaid income tax | 1,991 |  |  | 267 |
Customs deposit | 163 |  |  | 114 |
Lease financing cost | — |  |  | 825 |
Other receivables | 69 |  |  | 379 |
| $ | 8,807 |  |  | $ | 37,102 |
Property, Plant and Equipment | Depreciation is provided for on a straight-line basis over the estimated useful lives of the related assets as follows:
Building |  | 20 to 30 years
Manufacturing machinery and equipment |  | 5 to 15 years
Equipment and tooling |  | 5 years
Computer hardware and software |  | 3 to 5 years
Office furniture and equipment |  | 5 years
Leasehold and building improvements |  | 2 to 20 years
Land use rights |  | 50 years
Property, plant and equipment, net
| June 30,
| 2020 |  | 2019
| (in thousands)
Land | $ | 4,877 |  |  | $ | 4,877 |
Building | 58,875 |  |  | 36,205 |
Manufacturing machinery and equipment | 447,079 |  |  | 303,750 |
Equipment and tooling | 25,398 |  |  | 20,739 |
Computer equipment and software | 38,779 |  |  | 34,048 |
Office furniture and equipment | 3,529 |  |  | 3,243 |
Leasehold improvements | 68,224 |  |  | 53,597 |
Land use rights | 8,502 |  |  | 8,760 |
| 655,263 |  |  | 465,219 |
Less: accumulated depreciation | (291,515 | ) |  | (252,982 | )
| 363,748 |  |  | 212,237 |
Equipment and construction in progress | 48,592 |  |  | 197,500 |
Property, plant and equipment, net | $ | 412,340 |  |  | $ | 409,737 |
Schedule of Other Assets, Noncurrent | Other long-term assets
| June 30,
| 2020 |  | 2019
| (in thousands)
Prepayments for property and equipment | $ | 2,242 |  |  | $ | 4,846 |
Investments in privately held companies | 100 |  |  | 700 |
Lease financing costs | — |  |  | 1,758 |
Customs deposit | 1,662 |  |  | 980 |
Other long-term deposits | 850 |  |  | 889 |
Office leases deposits | 766 |  |  | 1,031 |
Other | 184 |  |  | 413 |
| $ | 5,804 |  |  | $ | 10,617 |
Schedule of Finite-Lived Intangible Assets | Intangible assets, net
| June 30,
| 2020 |  | 2019
| (in thousands)
Patents and technology rights | $ | 18,037 |  |  | $ | 18,037 |
Trade name | 268 |  |  | 268 |
Customer relationships | 1,150 |  |  | 1,150 |
| 19,455 |  |  | 19,455 |
Less: accumulated amortization | (2,954 | ) |  | (2,842 | )
| 16,501 |  |  | 16,613 |
Goodwill | 269 |  |  | 269 |
Intangible assets, net | $ | 16,770 |  |  | $ | 16,882 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense | Estimated future minimum amortization expense of intangible assets is as follows (in thousands):
Year ending June 30, |
2021 | $ | 3,360 |
2022 | 3,360 |
2023 | 3,286 |
2024 | 3,249 |
2025 | 3,246 |
| $ | 16,501 |
Schedule of Accrued Liabilities | Accrued liabilities
| June 30,
| 2020 |  | 2019
| (in thousands)
Accrued compensation and benefits | $ | 19,968 |  |  | $ | 16,385 |
Warranty accrual | 709 |  |  | 623 |
Stock rotation accrual | 3,358 |  |  | 1,921 |
Accrued professional fees | 5,868 |  |  | 1,721 |
Accrued inventory | 775 |  |  | 857 |
Accrued facilities related expenses | 1,831 |  |  | 4,233 |
Accrued financing lease costs | — |  |  | 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 |
| $ | 54,986 |  |  | $ | 44,075 |
Schedule of Product Warranty Liability | The activity in the warranty accrual, included in accrued liabilities is as follows:
| Year Ended June 30,
| 2020 |  | 2019 |  | 2018
| (in thousands)
Beginning balance | $ | 623 |  |  | $ | 535 |  |  | $ | 1,866 |
Addition | 895 |  |  | 236 |  |  | (147 | )
Released | — |  |  | — |  |  | (1,000 | )
Utilization | (809 | ) |  | (148 | ) |  | (184 | )
Ending balance | $ | 709 |  |  | $ | 623 |  |  | $ | 535 |
Stock Rotation Accrual | The activity in the stock rotation accrual, included in accrued liabilities is as follows:
| Year Ended June 30,
| 2020 |  | 2019 |  | 2018
| (in thousands)
Beginning balance | $ | 1,921 |  |  | $ | 1,750 |  |  | $ | 1,871 |
Addition | 9,441 |  |  | 5,267 |  |  | 2,714 |
Utilization | (8,004 | ) |  | (5,096 | ) |  | (2,835 | )
Ending balance | $ | 3,358 |  |  | $ | 1,921 |  |  | $ | 1,750 |
Schedule of Other Long-Term Liabilities | Other long-term liabilities
| June 30, |
| 2020 |  | 2019 |
| (in thousands) |
Deferred rent | $ | — |  |  | $ | 65 |  |
Customer deposits | 8,000 |  | * | 10,000 |  | *
Computer software liabilities | 1,897 |  |  | 3,701 |  |
Other | 826 |  |  | 155 |  |
Other long-term liabilities | $ | 10,723 |  |  | $ | 13,921 |  |
* Customer deposit from our customer A and customer B for securing future shipment from the Company. The Company reclassified $2.0 million of the customer deposit to short term accrued liabilities during the fiscal year ended June 30, 2020 since the repayment of this amount is due within a year.

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