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v3.20.2

The Company and Significant Accounting Policies - Property and Equipment Useful Lives (Details) | 12 Months Ended
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Jun. 30, 2020
Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Length of economic benefit to capitalize internal use software development costs | 1 year
Building | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, useful life | 20 years
Building | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, useful life | 30 years
Manufacturing machinery and equipment | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, useful life | 5 years
Manufacturing machinery and equipment | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, useful life | 15 years
Equipment and tooling |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, useful life | 5 years
Computer equipment and software | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, useful life | 3 years
Computer equipment and software | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, useful life | 5 years
Office furntiture and equipment |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, useful life | 5 years
Leasehold improvements | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, useful life | 2 years
Leasehold improvements | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, useful life | 20 years
Land use rights |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, useful life | 50 years
Software Development | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Finite-lived intangible asset, useful life | 3 years
Software Development | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Finite-lived intangible asset, useful life | 5 years

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- Definition Length of Economic Benefit To Capitalize Internal Use Software Development Costs + References No definition available. + Details
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Namespace Prefix: | aosl_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_MachineryAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_EquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ComputerEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_OfficeEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LeaseholdImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=aosl_LandUseRightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_SoftwareDevelopmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |