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Description of Business	12 Months Ended
Description of Business	Jun. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	Description of Business Mercury Systems, Inc., formerly Mercury Computer Systems, Inc., (the “Company” or “Mercury”) provides commercially developed, open sensor and Big Data processing systems, software and services for critical commercial, defense and intelligence applications. The Company delivers innovative solutions, rapid time-to-value and world-class service and support to our defense prime contractor customers. The Company's products and solutions have been deployed in more than 300 programs with over 25 different defense prime contractors. Key programs include Aegis, Patriot, Surface Electronic Warfare Improvement Program ("SEWIP"), Predator and Reaper. The Company also deliver services and solutions in support of the intelligence community. The Company's goal is to grow and build on its position as a critical component of the defense and intelligence industrial base and become the leading provider of open and affordable sensor processing subsystems. The Mercury Commercial Electronics (“MCE”) operating segment designs, develops and builds open sensor processing products and subsystems that include embedded processing modules and subsystems, radio frequency (“RF”) and microwave multi-function assemblies as well as subsystems, and RF and microwave components. The Mercury Defense Systems (“MDS”) operating segment leverages building blocks provided by MCE to build solutions for electronic warfare (“EW”) and electronic countermeasures ("ECM"), electro optical/infrared, signal intelligence (“SIGINT”) and radar environment test and simulation. The Mercury Intelligence Systems (“MIS”) operating segment delivers Big Data analytic processing, predictive analytics and multi-intelligence analysis in support of the intelligence community.