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Balance Sheet Components (Tables) | 12 Months Ended
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Jun. 30, 2019
Balance Sheet Related Disclosures [Abstract] |
Schedule of Accounts, Notes, Loans and Financing Receivable | Accounts receivable
| June 30,
| 2019 |  | 2018
| (in thousands)
Accounts receivable | $ | 48,401 |  |  | $ | 52,687 |
Less: Allowance for price adjustments | (24,075 | ) |  | (18,902 | )
Less: Allowance for doubtful accounts | (30 | ) |  | (30 | )
Accounts receivable, net | $ | 24,296 |  |  | $ | 33,755 |
Schedule of Inventory, Current | Inventories
| June 30,
| 2019 |  | 2018
| (in thousands)
Raw materials | $ | 59,076 |  |  | $ | 47,097 |
Work in-process | 38,214 |  |  | 35,243 |
Finished goods | 14,353 |  |  | 7,842 |
| $ | 111,643 |  |  | $ | 90,182 |
Schedule of Other Current Assets | Other current assets:
| June 30,
| 2019 |  | 2018
| (in thousands)
VAT receivable | $ | 30,769 |  |  | $ | 17,601 |
Other prepaid expenses | 2,745 |  |  | 2,121 |
Prepaid insurance | 939 |  |  | 906 |
Prepaid maintenance | 481 |  |  | 556 |
Prepayments to supplier | 583 |  |  | 227 |
Prepaid income tax | 267 |  |  | 761 |
Customs deposit | 114 |  |  | 5,749 |
Lease financing cost | 825 |  |  | 960 |
Other receivables | 379 |  |  | 670 |
| $ | 37,102 |  |  | $ | 29,551 |
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,
| 2019 |  | 2018
| (in thousands)
Land | $ | 4,877 |  |  | $ | 4,877 |
Building | 36,205 |  |  | 4,325 |
Manufacturing machinery and equipment | 303,750 |  |  | 265,192 |
Equipment and tooling | 20,739 |  |  | 16,605 |
Computer equipment and software | 34,048 |  |  | 25,686 |
Office furniture and equipment | 3,243 |  |  | 2,314 |
Leasehold improvements | 53,597 |  |  | 29,900 |
Land use rights | 8,760 |  |  | 9,089 |
| 465,219 |  |  | 357,988 |
Less: accumulated depreciation | (252,982 | ) |  | (225,184 | )
| 212,237 |  |  | 132,804 |
Equipment and construction in progress | 197,500 |  |  | 198,852 |
Property, plant and equipment, net | $ | 409,737 |  |  | $ | 331,656 |
Schedule of Other Assets, Noncurrent | Other long-term assets
| June 30,
| 2019 |  | 2018
| (in thousands)
Prepayments for property and equipment | $ | 4,846 |  |  | $ | 17,599 |
Investments in privately held companies | 700 |  |  | 700 |
Lease financing costs | 1,758 |  |  | 1,922 |
VAT long-term receivable | — |  |  | 3,396 |
Customs deposit | 980 |  |  | 1,589 |
Other long-term deposits | 889 |  |  | 2,252 |
Office leases deposits | 1,031 |  |  | 853 |
Other | 413 |  |  | 387 |
| $ | 10,617 |  |  | $ | 28,698 |
Schedule of Finite-Lived Intangible Assets | Intangible assets, net
| June 30,
| 2019 |  | 2018
| (in thousands)
Patents and technology rights | $ | 18,037 |  |  | $ | 17,633 |
Trade name | 268 |  |  | 268 |
Customer relationships | 1,150 |  |  | 1,150 |
| 19,455 |  |  | 19,051 |
Less: accumulated amortization | (2,842 | ) |  | (2,729 | )
| 16,613 |  |  | 16,322 |
Goodwill | 269 |  |  | 269 |
Intangible assets, net | $ | 16,882 |  |  | $ | 16,591 |
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, |
2020 | $ | 925 |
2021 | 3,360 |
2022 | 3,360 |
2023 | 3,286 |
2024 | 3,249 |
Thereafter | 2,433 |
| $ | 16,613 |
Schedule of Accrued Liabilities | Accrued liabilities
| June 30,
| 2019 |  | 2018
| (in thousands)
Accrued compensation and benefits | $ | 16,385 |  |  | $ | 18,484 |
Warranty accrual | 623 |  |  | 535 |
Stock rotation accrual | 1,921 |  |  | 1,750 |
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 |
| $ | 44,075 |  |  | $ | 49,841 |
Schedule of Product Warranty Liability | The activity in the warranty accrual, included in accrued liabilities is as follows:
| Year Ended June 30,
| 2019 |  | 2018 |  | 2017
| (in thousands)
Beginning balance | $ | 535 |  |  | $ | 1,866 |  |  | $ | 1,495 |
Addition | 236 |  |  | (147 | ) |  | 1,476 |
Released | — |  |  | (1,000 | ) |  | (580 | )
Utilization | (148 | ) |  | (184 | ) |  | (525 | )
Ending balance | $ | 623 |  |  | $ | 535 |  |  | $ | 1,866 |
Stock Rotation Accrual | The activity in the stock rotation accrual, included in accrued liabilities is as follows:
| Year Ended June 30,
| 2019 |  | 2018 |  | 2017
| (in thousands)
Beginning balance | $ | 1,750 |  |  | $ | 1,871 |  |  | $ | 1,988 |
Addition | 5,267 |  |  | 2,714 |  |  | 4,819 |
Utilization | (5,096 | ) |  | (2,835 | ) |  | (4,936 | )
Ending balance | $ | 1,921 |  |  | $ | 1,750 |  |  | $ | 1,871 |
Deferred Margin | Deferred margin Deferred margin consists of the following:
| June 30,
| 2019 |  | 2018
| (in thousands)
Deferred revenue | $ | — |  |  | $ | 2,555 |
Deferred costs | — |  |  | (890 | )
Deferred margin | $ | — |  |  | $ | 1,665 |
Schedule of Other Long-Term Liabilities | Other long-term liabilities:
| June 30, 2019 |  | June 30, 2018
| (in thousands)
Deferred rent | $ | 65 |  |  | $ | 238 |
Customer deposits | 10,000 |  | * | — |
Computer software liabilities | 3,701 |  |  | — |
Other | 155 |  |  | 755 |
Other long-term liabilities | $ | 13,921 |  |  | $ | 993 |
* Customer deposit from our customer A and customer B for securing future shipment from the Company

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