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Description of Business	6 Months Ended
Description of Business	Dec. 31, 2021
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 products and 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 that are open, purpose-built and uncompromised to meet our customers’ most-pressing high-tech needs, including those specific to the defense community. 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.