Litigation and Other Contingencies	3 Months Ended
Litigation and Other Contingencies	Mar. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Litigation and Other Contingencies	Note Ten — Litigation and Other Contingencies The company is a party to various agreements, including all its client contracts, under which it may be obligated to indemnify the other party with respect to certain matters, including, but not limited to, indemnification against third-party claims of (i) infringement of intellectual property rights with respect to services, software, and other deliverables provided by the company, and (ii) failure to comply with various data security and privacy regulations. These obligations may be subject to various limitations on the remedies available to the other party, including, without limitation, limits on the amounts recoverable and the time during which claims may be made, and may be supported by indemnities given to the company by applicable third parties. Payment by the company under these indemnification clauses is generally subject to the other party making a claim that is subject to challenge by the company. Historically, the company has not been obligated to pay any claim for indemnification under its agreements, and management is not aware of future indemnification payments that it would be obligated to make. Under its by-laws, subject to certain exceptions, the company has agreed to indemnify its corporate officers and directors for certain events or occurrences while the officer or director is, or was, serving at its request in such capacity or in certain related capacities. The company has separate indemnification agreements with each of its corporate officers and directors that requires it, subject to certain exceptions, to indemnify them to the fullest extent authorized or permitted by its by-laws and the Delaware General Corporation Law. The maximum potential amount of future payments the company could be required to make under these indemnification agreements is unlimited; however, the company has a director and officer liability insurance policy that limits its exposure and enables it to recover a portion of any amounts paid under these indemnification agreements. As a result of its insurance policy coverage, the company believes the estimated fair value of these indemnification agreements is minimal. The company had no liabilities recorded for these agreements as of March 31, 2018. The company’s products may be subject to sales tax in certain jurisdictions. If a taxing authority were to successfully assert that the company has not properly collected sales or other transaction taxes, or if sales or other transaction tax laws or the interpretation thereof were to change, and the company was unable to enforce the terms of its contracts with customers that give it the right to reimbursement for assessed sales taxes, the company could incur tax liabilities in amounts that could be material. The company has considered the changing nature of tax laws, the terms of its customer contracts and its recent audit experience in assessing its exposure to possible and probable sales tax liabilities. Based on its assessment, the company has recorded a sales tax liability of $0.3 million at March 31, 2018.

Mattersight Corp 10-Q