v2.4.0.6
DOCUMENT AND ENTITY INFORMATION (USD $)
12 Months Ended
Jun. 30, 2012
Sep. 01, 2012
Dec. 31, 2011
Entity Registrant Name CONSUMERS BANCORP INC /OH/    
Entity Central Index Key 0001006830    
Current Fiscal Year End Date --06-30    
Entity Filer Category Smaller Reporting Company    
Trading Symbol cbkm    
Entity Common Stock, Shares Outstanding   2,056,349  
Document Type 10-K    
Amendment Flag false    
Document Period End Date Jun. 30, 2012    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2012    
Entity Well-Known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 17,591,175