Schedule I - Condensed Financial Information of Parent Company (Details)	12 Months Ended
Jun. 30, 2020
Schedule I - Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Restricted Net Assets Threshold for Condensed Parent Company Financial Statements, Percent Requirement	25.00%

Restricted Net Assets Threshold for Condensed Parent Company Financial Statements, Percent Requirement

No definition available.

Name:	aosl_RestrictedNetAssetsThresholdForCondensedParentCompanyFinancialStatementsPercentRequirement
Namespace Prefix:	aosl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration