Line of Credit Facility, Accordion Feature, Increase Limit

No definition available.

Name:	smci_LineOfCreditFacilityAccordionFeatureIncreaseLimit
Namespace Prefix:	smci_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number Of Loan Contracts Entered Into

+ References

No definition available.

+ Details

Name:	smci_NumberOfLoanContractsEnteredInto
Namespace Prefix:	smci_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

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+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ShortTermDebtLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=smci_ChangHwaBankCreditLinesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=smci_DrawDownInstrumentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=smci_ChangHwaBankTermLoanFacilityMember
Namespace Prefix:
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Period Type:

Lines of Credit and Term Loans - Chang Hwa Bank Narrative (Details) - Revolving Credit Facility - Chang Hwa Bank $ in Millions, $ in Millions	Apr. 26, 2024 USD ($) loanContract	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Apr. 26, 2024 TWD ($)	May 13, 2022 USD ($)	Oct. 05, 2021 USD ($)	Oct. 05, 2021 TWD ($)
Chang Hwa Bank Credit Lines \| Line of credit
Short-term Debt [Line Items]
Credit facility, maximum borrowing capacity	$ 20.0			$ 300.0			$ 1,000.0
Line of credit facility, accordion feature, increase limit					$ 20.0
Line of credit		$ 0.0	$ 9.2
Credit facility, remaining borrowing capacity		30.3
Chang Hwa Bank Credit Lines \| Draw Down Instruments
Short-term Debt [Line Items]
Credit facility, maximum borrowing capacity	$ 20.0			$ 300.0		$ 20.0
Number of loan contracts entered into \| loanContract	3
Credit facility, basis spread on variable rate (as a percent)	1.40%
Chang Hwa Bank Term Loan Facility \| Line of credit
Short-term Debt [Line Items]
Term loans, non-current		$ 11.4	$ 17.9