XML 15 R1.htm IDEA: XBRL DOCUMENT v3.25.0.1
Document And Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2024
Mar. 01, 2025
Jun. 30, 2024
Document Information [Line Items]      
Entity Central Index Key 0001132651    
Entity Registrant Name AMES NATIONAL CORPORATION    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2024    
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2024    
Document Transition Report false    
Entity File Number 0-32637    
Entity Incorporation, State or Country Code IA    
Entity Tax Identification Number 42-1039071    
Entity Address, Address Line One 323 Sixth Street    
Entity Address, City or Town Ames    
Entity Address, State or Province IA    
Entity Address, Postal Zip Code 50010    
City Area Code 515    
Local Phone Number 232-6251    
Title of 12(b) Security Common Stock, $2.00 par value    
Trading Symbol ATLO    
Security Exchange Name NASDAQ    
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     $ 181,706,385
Entity Common Stock, Shares Outstanding   8,915,557  
Auditor Name Forvis Mazars LLP    
Auditor Location Springfield, MO.    
Auditor Firm ID 686