v2.4.0.8

Assets and Liabilities of Angel Dot Com Business Classified as Held for Sale (Parenthetical) (Detail) (Angel. Com, USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Angel. Com
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Unpaid Deferred Revenue	$ 554
Allowance for doubtful accounts	347
Unpaid Deferred Revenue	$ 554

X

- Definition

Disposal Group, Including Discontinued Operation, Allowance for Doubtful Accounts

+ References

No definition available.

+ Details

Name:	mstr_DisposalGroupIncludingDiscontinuedOperationAllowanceForDoubtfulAccounts
Namespace Prefix:	mstr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Disposal Group, Including Discontinued Operation, Unpaid Deferred Revenue netted out of Accounts Receivable

+ References

No definition available.

+ Details

Name:	mstr_DisposalGroupIncludingDiscontinuedOperationUnpaidDeferredRevenue
Namespace Prefix:	mstr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Disposal Group, Including Discontinued Operation, Unpaid Deferred Revenue netted out of Deferred Revenue

+ References

No definition available.

+ Details

Name:	mstr_DisposalGroupIncludingDiscontinuedOperationUnpaidDeferredRevenueReduction
Namespace Prefix:	mstr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

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