v2.4.0.6
Document And Entity Information
6 Months Ended
Dec. 31, 2011
Jan. 31, 2012
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Dec. 31, 2011  
Document Fiscal Year Focus 2012  
Document Fiscal Period Focus Q2  
Entity Registrant Name MERCURY COMPUTER SYSTEMS INC  
Entity Central Index Key 0001049521  
Current Fiscal Year End Date --06-30  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   30,858,510