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Stock-Based Compensation And Stockholders' Equity - Equity Incentive Plan (Details)
6 Months Ended
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Authorized shares available for future issuance under the 2006 Plan 989,406us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Equity Incentive Plan, 2006 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Increase in number of shares of common stock reserved for issuance under the 2006 Plan 3.00%smci_SharebasedCompensationArrangementbySharebasedPaymentAwardSharesAvailableforIssuanceAnnualIncrementalIncreasePercent
/ us-gaap_PlanNameAxis
= smci_EquityIncentivePlan2006Member
Equity Incentive Plan, 2006, More Than 10% Ownership [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Percentage of fair market value 110.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent
/ us-gaap_PlanNameAxis
= smci_EquityIncentivePlan2006MoreThan10OwnershipMember
Equity Incentive Plan, 2006, Less Than 10% Ownership [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Percentage of fair market value 100.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent
/ us-gaap_PlanNameAxis
= smci_EquityIncentivePlan2006LessThan10OwnershipMember
Stock Options [Member] | Equity Incentive Plan, 2006 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting period 4 years
Stock option expected life 10 years
Stock Options [Member] | Year One | Equity Incentive Plan, 2006 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Stock option vesting rights, percentage 25.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= smci_EquityIncentivePlan2006Member
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheOneMember
Stock Options [Member] | Quarterly | Equity Incentive Plan, 2006 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Stock option vesting rights, percentage 6.25%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= smci_EquityIncentivePlan2006Member
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheTwoMember