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Commitments and Contingencies (Details) - USD ($) $ in Thousands | Sep. 30, 2016 | Jun. 30, 2016
--- | --- | ---
Purchase commitments, hard disk drives |  |
Purchase commitments, total | $ 354,796 | $ 334,010
Hard Disk Drive Commitment |  |
Purchase commitments, hard disk drives |  |
Purchase commitments, total | $ 42,200 |

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- Definition [Line Items] for Long-term And Short-term Purchase Commitment [Table] + References No definition available. + Details
Name: | smci_LongtermAndShorttermPurchaseCommitmentLineItems
Namespace Prefix: | smci_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier. + References No definition available. + Details
Name: | us-gaap_PurchaseObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | smci_TypeOfPurchaseCommitmentAxis=smci_HardDiskDriveCommitmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |