Commitments and Contingencies	6 Months Ended
Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Legal Matters — The Company is subject to legal proceedings and claims that arise in the ordinary course of business. From time to time, third parties have asserted and may in the future assert intellectual property rights to technologies that are important to the Company’s business and have demanded and may in the future demand that the Company license their technology. The Company records an estimated liability for these matters when an adverse outcome is considered to be probable and can be reasonably estimated. Although the outcome of the litigation cannot be predicted with certainty and some lawsuits, claims, or proceedings may be disposed of unfavorably to the Company, which could materially and adversely affect its financial condition or results of operations, the Company does not believe that it is currently a party to any material legal proceedings. On March 4, 2011, DataTrak International, Inc. ("DataTrak") filed a complaint for alleged patent infringement against the Company in DataTrak International v. Medidata Solutions, C.A. No. 1:11-cv-00458 in the U.S. District Court for the Northern District of Ohio. The complaint asserts infringement of U.S. Patent No. 7,464,087 (the “ '087 Patent”), which claims a method and system for unifying data from a variety of sources. The complaint asserts that the Company infringes upon the patent owned, and seeks unspecified damages and injunctive relief. On October 28, 2011, the Company filed an application for ex parte reexamination of the '087 Patent with the U.S. Patent and Trademark Office (the “PTO”). On December 16, 2011, the district court granted the Company's motion to stay the case pending reexamination of the patent-in-suit. On April 6, 2012, the PTO issued its final office action rejecting all asserted claims of the '087 Patent. In July 2012, DataTrak filed a notice of appeal to the Board of Patent Appeals and Interferences (the "BPAI"). The BPAI rendered a decision on March 4, 2014, affirming the rejection of some claims of the '087 Patent and reversing the rejection of other claims. The PTO issued a notice of intent to issue ex parte reexamination certificate on August 1, 2014, which confirmed patentability of the remaining claims and closed the reexamination proceeding. The court lifted the stay of this action on September 9, 2014, and discovery in the case is proceeding. The Company believes that it has valid defenses to the lawsuit and intends to defend itself vigorously. The probability of a favorable or unfavorable outcome to the Company arising from the lawsuit is not known nor can the liability that could potentially result from a negative outcome be reasonably estimated. As a result, the Company has not recorded an accrual associated with this litigation. Additionally, given the current stage of the proceedings, the complexities of the facts in dispute, and the multiple claims involved, the Company is unable to estimate a range of loss related to this litigation. On March 25, 2015, the Company filed a separate lawsuit against DataTrak in the United States District Court for the District of New Jersey. The complaint asserts that DataTrak infringes U.S. Patents Nos. 8,738,397 (the " '397 Patent") and 8,620,677 (the " '677 Patent"), pertaining to patient randomization and site performance in clinical trials. On May 20, 2015, DataTrak filed a motion to dismiss the Company's claims against them on the basis that its ‘397 and '677 patents are invalid under 35 U.S.C. §101 asserting that the claims of each of these patents are directed at an abstract idea and do not constitute patentable subject matter. The defendant's motion to dismiss is now fully briefed and awaiting decision by the court. The outcome and amount of any future financial impact from this litigation is indeterminate at this time. Contractual Warranties — The Company typically provides contractual warranties to its customers covering its solutions and services. To date, any refunds provided to customers have been immaterial. Change in Control Agreements — The Company has change in control agreements with its chief executive officer and certain other executive officers. These agreements provide for payments to be made to such officers upon involuntary termination of their employment by the Company without cause or by such officers for good reason as defined in the agreements, within a period of 2 years following a change in control. The agreements provide that, upon a qualifying termination event, such officers will be entitled to (a) a severance payment equal to the officer’s base salary plus target bonus amount; (b) continuation of health benefits for 12 months; and (c) immediate vesting of remaining unvested equity awards, unless otherwise specified in the equity award agreements.

COMMITMENTS AND CONTINGENCIES

Legal Matters — The Company is subject to legal proceedings and claims that arise in the ordinary course of business. From time to time, third parties have asserted and may in the future assert intellectual property rights to technologies that are important to the Company’s business and have demanded and may in the future demand that the Company license their technology. The Company records an estimated liability for these matters when an adverse outcome is considered to be probable and can be reasonably estimated. Although the outcome of the litigation cannot be predicted with certainty and some lawsuits, claims, or proceedings may be disposed of unfavorably to the Company, which could materially and adversely affect its financial condition or results of operations, the Company does not believe that it is currently a party to any material legal proceedings.

On March 4, 2011, DataTrak International, Inc. ("DataTrak") filed a complaint for alleged patent infringement against the Company in DataTrak International v. Medidata Solutions, C.A. No. 1:11-cv-00458 in the U.S. District Court for the Northern District of Ohio. The complaint asserts infringement of U.S. Patent No. 7,464,087 (the “ '087 Patent”), which claims a method and system for unifying data from a variety of sources. The complaint asserts that the Company infringes upon the patent owned, and seeks unspecified damages and injunctive relief. On October 28, 2011, the Company filed an application for ex parte reexamination of the '087 Patent with the U.S. Patent and Trademark Office (the “PTO”). On December 16, 2011, the district court granted the Company's motion to stay the case pending reexamination of the patent-in-suit. On April 6, 2012, the PTO issued its final office action rejecting all asserted claims of the '087 Patent. In July 2012, DataTrak filed a notice of appeal to the Board of Patent Appeals and Interferences (the "BPAI"). The BPAI rendered a decision on March 4, 2014, affirming the rejection of some claims of the '087 Patent and reversing the rejection of other claims. The PTO issued a notice of intent to issue ex parte reexamination certificate on August 1, 2014, which confirmed patentability of the remaining claims and closed the reexamination proceeding. The court lifted the stay of this action on September 9, 2014, and discovery in the case is proceeding.

The Company believes that it has valid defenses to the lawsuit and intends to defend itself vigorously. The probability of a favorable or unfavorable outcome to the Company arising from the lawsuit is not known nor can the liability that could potentially result from a negative outcome be reasonably estimated. As a result, the Company has not recorded an accrual associated with this litigation. Additionally, given the current stage of the proceedings, the complexities of the facts in dispute, and the multiple claims involved, the Company is unable to estimate a range of loss related to this litigation.

On March 25, 2015, the Company filed a separate lawsuit against DataTrak in the United States District Court for the District of New Jersey. The complaint asserts that DataTrak infringes U.S. Patents Nos. 8,738,397 (the " '397 Patent") and 8,620,677 (the " '677 Patent"), pertaining to patient randomization and site performance in clinical trials. On May 20, 2015, DataTrak filed a motion to dismiss the Company's claims against them on the basis that its ‘397 and '677 patents are invalid under 35 U.S.C. §101 asserting that the claims of each of these patents are directed at an abstract idea and do not constitute patentable subject matter. The defendant's motion to dismiss is now fully briefed and awaiting decision by the court. The outcome and amount of any future financial impact from this litigation is indeterminate at this time.

Contractual Warranties — The Company typically provides contractual warranties to its customers covering its solutions and services. To date, any refunds provided to customers have been immaterial.

Change in Control Agreements — The Company has change in control agreements with its chief executive officer and certain other executive officers. These agreements provide for payments to be made to such officers upon involuntary termination of their employment by the Company without cause or by such officers for good reason as defined in the agreements, within a period of 2 years following a change in control. The agreements provide that, upon a qualifying termination event, such officers will be entitled to (a) a severance payment equal to the officer’s base salary plus target bonus amount; (b) continuation of health benefits for 12 months; and (c) immediate vesting of remaining unvested equity awards, unless otherwise specified in the equity award agreements.