XML 14 R1.htm IDEA: XBRL DOCUMENT v3.6.0.2
Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2016
Mar. 02, 2017
Jun. 30, 2016
Document and entity information [Abstract]      
Entity public float     $ 67,049,050
Current fiscal year end date --12-31    
Entity central index key 0000750574    
Entity current reporting status Yes    
Entity filer category Smaller Reporting Company    
Entity registrant name Auburn National Bancorporation, Inc    
Trading Symbol AUBN    
Entity voluntary filers No    
Entity well known seasoned issuer No    
Entity common stock shares outstanding   3,643,543  
Amendment flag false    
Document Type 10-K    
Document Year Focus 2016    
Document Period Focus FY    
Document Period End Date Dec. 31, 2016