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Balance Sheet Components - Property, plant, and equipment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017
Property, Plant and Equipment [Line Items] |  |  |
Property, plant, and equipment excluding equipment and construction In progress, gross | $ 465,219 | $ 357,988 |
Land Use Rights, Gross | 8,760 | 9,089 |
Less accumulated depreciation | (252,982) | (225,184) |
Property, plant and equipment excluding equipment and construction in progress, net | 212,237 | 132,804 |
Equipment and construction in progress | 197,500 | 198,852 |
Property, plant and equipment, net | 409,737 | 331,656 |
Depreciation expense | 31,900 | 29,200 | $ 27,200
Capitalized software development costs | 800 | 300 | 200
Capitalized Computer Software, Amortization | 500 | 600 | $ 600
Unamortized capitalized software development costs | 900 | 700 |
Land [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant, and equipment excluding equipment and construction In progress, gross | 4,877 | 4,877 |
Building [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant, and equipment excluding equipment and construction In progress, gross | 36,205 | 4,325 |
Manufacturing machinery and equipment [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant, and equipment excluding equipment and construction In progress, gross | 303,750 | 265,192 |
Equipment and tooling [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant, and equipment excluding equipment and construction In progress, gross | 20,739 | 16,605 |
Computer equipment and software [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant, and equipment excluding equipment and construction In progress, gross | 34,048 | 25,686 |
Office furniture and equipment [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant, and equipment excluding equipment and construction In progress, gross | 3,243 | 2,314 |
Leasehold improvements [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant, and equipment excluding equipment and construction In progress, gross | 53,597 | 29,900 |
Computer software |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Gross amount of computer software recorded under capital lease | 13,700 | 8,200 |
Accumulated depreciation on computer software recorded under capital lease | $ 8,200 | $ 7,300 |

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