Document and Entity Information	3 Months Ended
	Mar. 25, 2012	Nov. 30, 2012
Document and Entity Information
Entity Registrant Name	KRATOS DEFENSE & SECURITY SOLUTIONS, INC.
Entity Central Index Key	0001069258
Document Type	10-Q
Document Period End Date	Mar. 25, 2012
Amendment Flag	true
Amendment Description	This amendment (the “Amendment”) to the Quarterly Report on Form 10-Q for the quarterly period ended March 25, 2012 (the “Original Form 10-Q”), of Kratos Defense & Security Solutions, Inc. (the “Company”) which was originally filed with the Securities and Exchange Commission (“SEC”) on May 3, 2012, is being filed for the purpose of adding Note 15 - Condensed Consolidating Financial Statements (the “Guarantor Footnote”) to the consolidated financial statements filed with the Original Form 10-Q in order to conform to the disclosure requirements of Rule 3-10 of Regulation S-X under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). The purpose of the Guarantor Footnote is to provide additional supplementary financial information to the holders of the Company’s publicly-traded debt instruments. The addition of the footnote does not affect any other portion of the Company’s consolidated financial statements, including the Consolidated Balance Sheets, Statements of Operations and Statements of Cash Flows. In addition, because the Company is reissuing its consolidated financial statements in order to add the Guarantor Footnote, SEC rules require that the Company retrospectively revise its consolidated financial statements to reflect certain events that occurred after the end of the fiscal year covered by the consolidated financial statements. Accordingly, the Company has revised its consolidated financial statements in accordance with FASB ASC Topic 205, Presentation of Financial Statements (“Topic 205”) to reflect the discontinuation of certain non-core businesses in June of 2012, an event which has already been reported in the Company’s Quarterly Reports on Form 10-Q for the quarters ended June 24, 2012 and September 30, 2012. As required by Rule 12b-15 under the Exchange Act, new certifications by the Company’s principal executive officer and principal financial officer are filed as exhibits to this Amendment under Item 6 of Part II hereof. This Amendment solely modifies the following portions of the original Form 10-Q: Part I - Items 1 and 2; and Part II Item 6, and does not reflect any events occurring after March 25, 2012 or modify or update the disclosures in the Original Form 10-Q that may have been affected by subsequent events, except as required to reflect the effects of the Company’s retrospective application of Topic 205 to reflect the discontinued operations and the addition of the Guarantor Footnote. For the convenience of the reader, this Amendment sets forth the Quarterly Report on Form 10-Q, as amended, in its entirety.
Current Fiscal Year End Date	--12-30
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		56,604,000
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q1