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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