Description of Business	3 Months Ended
Description of Business	Oct. 02, 2020
Accounting Policies [Abstract]
Description of Business	Description of Business Mercury Systems, Inc. (the “Company” or “Mercury”) is a leading technology company serving the aerospace and defense industry, positioned at the intersection of high-tech and defense. Headquartered in Andover, Massachusetts, the Company delivers solutions that power a broad range of aerospace and defense programs, optimized for mission success in some of the most challenging and demanding environments. The Company envisions, creates and delivers innovative technology solutions purpose-built to meet its customers’ most-pressing high-tech needs, including those specific to the defense community. As a leading manufacturer of essential components, modules and subsystems, the Company sells to defense prime contractors, the U.S. government and original equipment manufacturer (“OEM”) commercial aerospace companies. The Company has built a trusted, contemporary portfolio of proven product solutions purpose-built for aerospace and defense that it believes meets and exceeds the performance needs of its defense and commercial customers. Customers add their own applications and algorithms to the Company's specialized, secure and innovative pre-integrated solutions. This allows them to complete their full system by integrating with their platform the sensor technology and, in some cases, the processing from Mercury. The Company's products and solutions are deployed in more than 300 programs with over 25 different defense prime contractors and commercial aviation customers. The Company's transformational business model accelerates the process of making new technology profoundly more accessible to its customers by bridging the gap between commercial technology and aerospace and defense applications. The Company's long-standing deep relationships with leading high-tech companies, coupled with the Company's high level of research and development (“R&D”) investments and industry-leading trusted and secure design and manufacturing capabilities, are the foundational tenets of this highly successful model. The Company's capabilities, technology and R&D investment strategy combine to differentiate Mercury in its industry. The Company's technologies and capabilities include secure embedded processing modules and subsystems, mission computers, secure and rugged rack-mount servers, safety-critical avionics, radio frequency (“RF”) components, multi-function assemblies, subsystems and custom microelectronics. The Company maintains its technological edge by investing in critical capabilities and intellectual property in processing and RF, leveraging open standards and open architectures to adapt quickly those building blocks into solutions for highly data-intensive applications, including emerging needs in areas such as artificial intelligence. The Company's mission critical solutions are deployed by its customers for a variety of applications including command, control, communications, computers, intelligence, surveillance and reconnaissance, electronic intelligence, avionics, electro-optical/infrared, electronic warfare, weapons and missile defense, hypersonics and radar. Investors and others should note that the Company announces material financial information using its website (www.mrcy.com), Securities and Exchange Commission (“SEC”) filings, press releases, public conference calls, webcasts, and social media, including Twitter (twitter.com/mrcy and twitter.com/mrcy_CEO) and LinkedIn (www.linkedin.com/company/mercury-systems). Therefore, the Company encourages investors and others interested in Mercury to review the information the Company posts on the social media and other communication channels listed on its website.