XML 81 R1.htm IDEA: XBRL DOCUMENT v2.4.0.6
Document and Entity Information (USD $)
 12 Months Ended
Jun. 28, 2012
Dec. 29, 2011
Aug. 24, 2012
Common Stock [Member]
Aug. 24, 2012
Class A Common Stock [Member]
Entity Registrant Name SANFILIPPO JOHN B & SON INC      
Entity Central Index Key 0000880117      
Document Type 10-K      
Document Period End Date Jun. 28, 2012      
Amendment Flag false      
Document Fiscal Year Focus 2012      
Document Fiscal Period Focus FY      
Current Fiscal Year End Date --06-28      
Entity Well Known Seasoned Issuer No      
Entity Voluntary Filers Yes      
Entity Current Reporting Status Yes      
Entity Filer Category Accelerated Filer      
Entity Public Float   $ 59,180,490    
Entity Common Stock, Shares Outstanding     8,164,805 2,597,426