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Income Taxes - Narrative (Details) - USD ($) | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2016 | Jun. 30, 2019 | Jun. 30, 2018 | Jul. 31, 2017 | Jul. 01, 2017 | Jun. 30, 2017 | Jun. 30, 2016
Tax Credit Carryforward [Line Items] |  |  |  |  |  |  |
Decrease in deferred tax assets | $ 6,600,000 |  |  |  |  |  |
Increase in prepaid tax asset | $ 6,600,000 |  |  |  |  |  |
Deferred tax asset, certain China patent rights and certain manufacturing related IP |  | $ 11,981,000 | $ 12,942,000 | $ 12,900,000 |  |  |
Book value, certain China patent rights and certain manufacturing related IP |  |  |  | $ 0 |  |  |
Valuation allowance |  | 35,420,000 | 30,105,000 |  |  |  |
Valuation allowance increase |  | 5,300,000 | 23,900,000 |  |  |  |
Undistributed earnings of foreign subsidiaries |  | 140,600,000 |  |  |  |  |
Unrecognized tax benefits |  | 7,150,000 | 7,143,000 |  |  | $ 6,589,000 | $ 6,743,000
Unrecognized tax benefit, amount netted against deferred tax assets |  | 6,300,000 |  |  |  |  |
Unrecognized tax benefits that would reduce effective income tax rate |  | 4,200,000 |  |  |  |  |
Decrease in unrecognized tax benefits is reasonably possible |  | 200,000 |  |  |  |  |
Income tax interest and penalties accrued |  | 200,000 | 100,000 |  |  |  |
Income tax interest and penalties expense |  | 30,000 | 0 |  |  |  |
Long-term Income Tax Payable [Member] |  |  |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |  |  |
Unrecognized tax benefits |  | 900,000 |  |  |  |  |
Federal [Member] |  |  |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |  |  |
Net operating loss carryforwards |  | 24,300,000 |  |  |  |  |
Research and development tax credit carryforwards |  | 5,600,000 |  |  |  |  |
State [Member] |  |  |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |  |  |
Tax credit carryforward |  | 6,700,000 |  |  |  |  |
Tax credit carryforward, subject to expiration |  | 800,000 |  |  |  |  |
Tax credit carryforward, not subject to expiration |  | 5,900,000 |  |  |  |  |
Net operating loss carryforwards |  | 600,000 |  |  |  |  |
Corporate Joint Venture |  |  |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |  |  |
Net operating loss carryforwards |  | 77,500,000 |  |  |  |  |
State research and development credit carryforward |  |  |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |  |  |
Valuation allowance |  | 5,100,000 | 4,400,000 |  |  |  |
Net operating loss, fixed asset and intangible asset | Corporate Joint Venture |  |  |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |  |  |
Valuation allowance |  | $ 30,300,000 | 25,700,000 |  |  |  |
Accounting Standards Update 2016-16 |  |  |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |  |  |
De-recognition of prepaid tax asset |  |  |  |  | $ 5,500,000 |  |
Restatement Adjustment |  |  |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |  |  |
Deferred tax asset, certain China patent rights and certain manufacturing related IP |  |  | 12,900,000 |  |  |  |
Valuation allowance |  |  | $ 12,900,000 |  |  |  |

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