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Balance Sheet Components - Stock Rotation Accrual (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Stock Rotation Accrual Increae (Decrease) [Roll Forward]
Beginning balance	$ 1,750	$ 1,871
Additions	748	791
Utilization	(723)	(668)
Ending balance	$ 1,775	$ 1,994

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- Definition

Stock Rotation Accrual, Current

+ References

No definition available.

+ Details

Name:	aosl_StockRotationAccrualCurrent
Namespace Prefix:	aosl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- Definition

Stock Rotation Accrual Increase (Decrease) [Roll forward]

+ References

No definition available.

+ Details

Name:	aosl_StockRotationAccrualIncreaeDecreaseRollForward
Namespace Prefix:	aosl_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

Stock Rotation Accrual, Payments

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No definition available.

+ Details

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

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- Definition

Stock Rotation Accrual, Stock Issued

+ References

No definition available.

+ Details

Name:	aosl_StockRotationAccrualStockIssued
Namespace Prefix:	aosl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration