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Description Of Business	9 Months Ended
Description Of Business	Mar. 31, 2012
Description Of Business [Abstract]
Description Of Business	A. Description of Business Mercury Computer Systems, Inc. (the "Company" or "Mercury") designs, manufactures and markets commercially-developed, high-performance embedded, real-time digital signal and image processing sub-systems and software for specialized defense and commercial computing markets. The Company's solutions play a critical role in a wide range of applications, transforming sensor data to information for analysis and action. In military reconnaissance and surveillance platforms, the Company's sub-systems process real-time radar, video, sonar and signals intelligence data. The Company provides microwave products for enhanced communications capabilities in military and commercial applications. Additionally, Mercury Federal Systems ("MFS"), the Company's wholly owned subsidiary, focuses on the defense contracting market with contracts which support the defense, intelligence, and homeland security markets. The Company's products and solutions address mission-critical requirements within the defense industry for C4ISR (command, control, communications, computers, intelligence, surveillance and reconnaissance) and electronic warfare, or EW, systems and services, and target several markets including maritime defense, airborne reconnaissance, ballistic missile defense, ground mobile and force protection systems and tactical communications and network systems. The Company's products or solutions have been deployed in over 300 different programs with over 25 different prime defense contractors.