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Income Taxes - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2021
Tax Credit Carryforward [Line Items] |  |  |  |
Valuation allowance | $ 7,266 | $ 6,686 |  |
Valuation allowance increase | 600 | 900 |  |
Tax credit carry forward | 8,200 |  |  |
Undistributed earnings of foreign subsidiaries | 414,600 |  |  |
Unrecognized tax benefits | 10,088 | 9,335 | $ 8,609 | $ 7,645
Unrecognized tax benefit, amount netted against deferred tax assets | 7,100 |  |  |
Unrecognized tax benefits that would reduce effective income tax rate | 6,900 |  |  |
Decrease in unrecognized tax benefits is reasonably possible | 200 |  |  |
Income tax interest and penalties accrued | 500 | 300 |  |
Income tax interest and penalties expense | 200 | 100 |  |
Income tax benefit | 3,649 | 5,937 | $ 39,258 |
Net operating loss carryforwards | 0 | 18 |  |
Alpha and Omega Semiconductor And AOS International LP |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Undistributed earnings of foreign subsidiaries | 46,200 |  |  |
Long-term Income Tax Payable |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Unrecognized tax benefits | 3,000 |  |  |
State |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Tax credit carryforward, subject to expiration | 600 |  |  |
Net operating loss carryforwards | 9,900 |  |  |
State | Period One |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Tax credit carryforward, not subject to expiration | 9,000 |  |  |
State | Period Two |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Tax credit carryforward, not subject to expiration | $ 300 |  |  |
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration, Term | 20 years |  |  |
State | Minimum | Period One |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration, Term | 10 years |  |  |
State | Maximum | Period One |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration, Term | 15 years |  |  |
Corporate Joint Venture |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Deferred tax liability | $ 26,300 |  |  |
State research and development credit carryforward |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Valuation allowance | $ 7,300 | $ 6,700 |  |

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