Commitments and Contingencies	9 Months Ended
Sep. 30, 2017
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	(7) Commitments and Contingencies (a) Commitments From time to time, the Company enters into certain types of contracts that require it to indemnify parties against third-party claims. These contracts primarily relate to agreements under which the Company assumes indemnity obligations for intellectual property infringement, as well as other obligations from time to time depending on arrangements negotiated with customers and other third parties. The conditions of these obligations vary. Thus, the overall maximum amount of the Company’s indemnification obligations cannot be reasonably estimated. Historically, the Company has not been obligated to make significant payments for these obligations and does not currently expect to incur any material obligations in the future. Accordingly, the Company has not recorded an indemnification liability on its balance sheets as of September 30, 2017 or December 31, 2016. The Company leases office space and computer and other equipment under operating lease agreements. It also leases certain computer and other equipment under capital lease agreements and licenses certain software under other financing arrangements. Under the lease agreements, in addition to base rent, the Company is generally responsible for certain taxes, utilities and maintenance costs, and other fees; and several leases include options for renewal or purchase. The Company leases approximately 214,000 square feet of office space at a location in Northern Virginia that began serving as its corporate headquarters in October 2010. The term of the lease expires in December 2020. At September 30, 2017 and December 31, 2016, deferred rent of $9.5 million and $12.3 million, respectively, was included in other long-term liabilities, and $3.7 million and $3.5 million, respectively, was included in current accrued expenses. (b) Contingencies In December 2011, DataTern, Inc. (“DataTern”) filed a complaint for patent infringement against the Company in the United States District Court for the District of Massachusetts (the “District Court”). The complaint alleged that the Company infringes U.S. Patent No. 6,101,502 (the “’502 Patent”), allegedly owned by DataTern, by making, selling, or offering for sale several of the Company’s products and services including MicroStrategy 9™, MicroStrategy Intelligence Server™, MicroStrategy Business Intelligence Platform™, MicroStrategy Cloud Personal, and other MicroStrategy applications for creating or using data mining, dashboards, business analytics, data storage and warehousing, and web hosting support. The complaint accused the Company of willful infringement and sought an unspecified amount of damages, an award of attorneys’ fees, and preliminary and permanent injunctive relief. In light of a judgment in a separate action involving DataTern in another jurisdiction, in February 2013, MicroStrategy and DataTern filed motions for summary judgment of non-infringement and the District Court entered summary judgment against DataTern. In March 2013, DataTern filed a notice of appeal with the United States Court of Appeals for the Federal Circuit (the “Federal Circuit”). In December 2014, the Federal Circuit issued an opinion vacating the District Court’s summary judgment, stating that the claim construction on which the summary judgment was based was incorrect. In January 2015, the case was remanded to the District Court for further proceedings. A claim construction ruling was issued in February 2017. In August 2017, counsel for DataTern filed a motion to withdraw from the lawsuit. The District Court initially gave DataTern a deadline of September 18, 2017 to find replacement counsel, which was later extended to October 20, 2017. On October 20, 2017, the District Court dismissed the case for failure to prosecute when DataTern failed to identify substitute counsel. The Company has received indemnification requests from certain of its channel partners and customers who were sued by DataTern in the District Court in lawsuits alleging infringement of the ‘502 Patent. The proceedings against these channel partners and customers have been stayed pending the resolution of DataTern’s lawsuit against the Company. The outcome of these matters is not presently determinable, and the Company cannot make a reasonable estimate of the possible loss or range of loss with respect to these matters at this time. Accordingly, no estimated liability for these matters has been accrued in the accompanying Consolidated Financial Statements. The Company is also involved in various other legal proceedings arising in the normal course of business. Although the outcomes of these other legal proceedings are inherently difficult to predict, management does not expect the resolution of these other legal proceedings to have a material adverse effect on the Company’s financial position, results of operations, or cash flows. The Company has contingent liabilities that, in management’s judgment, are not probable of assertion. If such unasserted contingent liabilities were to be asserted, or become probable of assertion, the Company may be required to record significant expenses and liabilities in the period in which these liabilities are asserted or become probable of assertion.

(7) Commitments and Contingencies

(a) Commitments

From time to time, the Company enters into certain types of contracts that require it to indemnify parties against third-party claims. These contracts primarily relate to agreements under which the Company assumes indemnity obligations for intellectual property infringement, as well as other obligations from time to time depending on arrangements negotiated with customers and other third parties. The conditions of these obligations vary. Thus, the overall maximum amount of the Company’s indemnification obligations cannot be reasonably estimated. Historically, the Company has not been obligated to make significant payments for these obligations and does not currently expect to incur any material obligations in the future. Accordingly, the Company has not recorded an indemnification liability on its balance sheets as of September 30, 2017 or December 31, 2016.

The Company leases office space and computer and other equipment under operating lease agreements. It also leases certain computer and other equipment under capital lease agreements and licenses certain software under other financing arrangements. Under the lease agreements, in addition to base rent, the Company is generally responsible for certain taxes, utilities and maintenance costs, and other fees; and several leases include options for renewal or purchase. The Company leases approximately 214,000 square feet of office space at a location in Northern Virginia that began serving as its corporate headquarters in October 2010. The term of the lease expires in December 2020.

At September 30, 2017 and December 31, 2016, deferred rent of $9.5 million and $12.3 million, respectively, was included in other long-term liabilities, and $3.7 million and $3.5 million, respectively, was included in current accrued expenses.

(b) Contingencies

In December 2011, DataTern, Inc. (“DataTern”) filed a complaint for patent infringement against the Company in the United States District Court for the District of Massachusetts (the “District Court”). The complaint alleged that the Company infringes U.S. Patent No. 6,101,502 (the “’502 Patent”), allegedly owned by DataTern, by making, selling, or offering for sale several of the Company’s products and services including MicroStrategy 9™, MicroStrategy Intelligence Server™, MicroStrategy Business Intelligence Platform™, MicroStrategy Cloud Personal, and other MicroStrategy applications for creating or using data mining, dashboards, business analytics, data storage and warehousing, and web hosting support. The complaint accused the Company of willful infringement and sought an unspecified amount of damages, an award of attorneys’ fees, and preliminary and permanent injunctive relief. In light of a judgment in a separate action involving DataTern in another jurisdiction, in February 2013, MicroStrategy and DataTern filed motions for summary judgment of non-infringement and the District Court entered summary judgment against DataTern. In March 2013, DataTern filed a notice of appeal with the United States Court of Appeals for the Federal Circuit (the “Federal Circuit”). In December 2014, the Federal Circuit issued an opinion vacating the District Court’s summary judgment, stating that the claim construction on which the summary judgment was based was incorrect. In January 2015, the case was remanded to the District Court for further proceedings. A claim construction ruling was issued in February 2017. In August 2017, counsel for DataTern filed a motion to withdraw from the lawsuit. The District Court initially gave DataTern a deadline of September 18, 2017 to find replacement counsel, which was later extended to October 20, 2017. On October 20, 2017, the District Court dismissed the case for failure to prosecute when DataTern failed to identify substitute counsel. The Company has received indemnification requests from certain of its channel partners and customers who were sued by DataTern in the District Court in lawsuits alleging infringement of the ‘502 Patent. The proceedings against these channel partners and customers have been stayed pending the resolution of DataTern’s lawsuit against the Company. The outcome of these matters is not presently determinable, and the Company cannot make a reasonable estimate of the possible loss or range of loss with respect to these matters at this time. Accordingly, no estimated liability for these matters has been accrued in the accompanying Consolidated Financial Statements.

The Company is also involved in various other legal proceedings arising in the normal course of business. Although the outcomes of these other legal proceedings are inherently difficult to predict, management does not expect the resolution of these other legal proceedings to have a material adverse effect on the Company’s financial position, results of operations, or cash flows.

The Company has contingent liabilities that, in management’s judgment, are not probable of assertion. If such unasserted contingent liabilities were to be asserted, or become probable of assertion, the Company may be required to record significant expenses and liabilities in the period in which these liabilities are asserted or become probable of assertion.