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Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES On February 1, 2018, we learned of a complaint filed naming us and our subsidiary, Spok, Inc., as defendants in GroupChatter, LLC v. Spok Holdings, Inc., et. al., Civ. A. No. 6:18-cv-00048, U.S. District Court for the Eastern District of Texas, alleging infringement of U.S. Patent Nos. 7,969,959; 9,699,637; 9,615,239; and 9,294,888. We have settled this lawsuit for an immaterial amount and the complaint has been dismissed with prejudice. Other than what is noted in the preceding paragraph, there have been no material changes during the three months ended March 31, 2018 to the commitments and contingencies previously reported in the 2017 Annual Report.