v3.25.2
Document And Entity Information - USD ($)
 12 Months Ended
Jun. 30, 2025
Sep. 05, 2025
Dec. 31, 2024
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Jun. 30, 2025    
Document Transition Report false    
Entity File Number 033-79130    
Entity Registrant Name CONSUMERS BANCORP, INC.    
Entity Incorporation, State or Country Code OH    
Entity Tax Identification Number 34-1771400    
Entity Address, Address Line One 614 East Lincoln Way    
Entity Address, City or Town Minerva    
Entity Address, State or Province OH    
Entity Address, Postal Zip Code 44657    
City Area Code 330)    
Local Phone Number 868-7701    
Title of 12(g) Security Common Shares, no par value    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 54,022,928
Entity Common Stock, Shares Outstanding (in shares)   3,144,775  
Auditor Name Plante & Moran, PLLC    
Auditor Location Cleveland, OH    
Auditor Firm ID 166    
Entity Central Index Key 0001006830    
Current Fiscal Year End Date --06-30    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Amendment Flag false