The Company and Significant Accounting Policies - Government Grants Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Government grants, reduction recorded to operating expenses			$ 0.1
Government grants, reduction recorded to property, plant and equipment	$ 0.7	$ 1.0	$ 0.6

Government Grants, Reduction Recorded To Property, Plant And Equipment

No definition available.

Name:	aosl_GovernmentGrantsReductionRecordedToPropertyPlantAndEquipment
Namespace Prefix:	aosl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration