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v2.4.1.9

Subsequent Events - Additional Information (Detail) (2013 Plan, Class A) | 1 Months Ended |
--- | --- | ---
Apr. 30, 2015 | Sep. 30, 2013
Subsequent Event [Line Items] |  |
Share-based compensation, stock authorized |  | 600,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Subsequent Event |  |
Subsequent Event [Line Items] |  |
Share-based compensation, stock authorized | 1,500,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = mstr_StockIncentivePlanTwentyThirteenMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Subsequent Event | Non Employee Directors |  |
Subsequent Event [Line Items] |  |
Number of automatic annual stock option grants authorized to each of the Company's non-employee directors beginning 2015 | 5,000 mstr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorizedPerParticipant / us-gaap_PlanNameAxis = mstr_StockIncentivePlanTwentyThirteenMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_TitleOfIndividualAxis = mstr_NonEmployeeDirectorsMember |

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- Definition Share Based Compensation Arrangement by Share Based Payment Award Number of Shares Authorized per Participant + References No definition available. + Details
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Namespace Prefix: | mstr_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Details
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- Details
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Data Type: | na
Balance Type: |
Period Type: |