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Document And Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Mar. 26, 2025
Jun. 28, 2024
Document And Entity Information [Abstract]        
Document Type 10-K      
Document Annual Report true      
Document Period End Date Dec. 31, 2024      
Document Transition Report false      
Amendment Flag false      
Document Fiscal Period Focus FY      
Entity Registrant Name BANK OF THE JAMES FINANCIAL GROUP, INC.      
Entity Incorporation, State or Country Code VA      
Entity File Number 001-35402      
Entity Tax Identification Number 20-0500300      
Entity Address, Address Line One 828 Main Street      
Entity Address, City or Town Lynchburg      
Entity Address, State or Province VA      
Entity Address, Postal Zip Code 24504      
City Area Code 434      
Local Phone Number 846-2000      
Entity Current Reporting Status Yes      
Entity Interactive Data Current Yes      
Document Fiscal Year Focus 2024      
Entity Central Index Key 0001275101      
Current Fiscal Year End Date --12-31      
Entity Well-known Seasoned Issuer No      
Entity Voluntary Filers No      
Entity Filer Category Non-accelerated Filer      
Entity Small Business true      
Entity Emerging Growth Company false      
Entity Public Float       $ 43,312,040
Title of 12(b) Security Common Stock, $2.14 par value      
Trading Symbol BOTJ      
Security Exchange Name NASDAQ      
Entity Shell Company false      
Entity Common Stock, Shares Outstanding     4,543,338  
Documents Incorporated by Reference DOCUMENTS INCORPORATED BY REFERENCE

Portions of the 2025 Proxy Statement to be used in conjunction with the Annual Meeting of Shareholders, scheduled to be held on May 20, 2025, are incorporated by reference into Part III of this Form 10-K

      
ICFR Auditor Attestation Flag false      
Document Financial Statement Error Correction false      
Auditor Firm Id 149 613    
Auditor Name Elliott Davis, PLLC Yount, Hyde & Barbour    
Auditor Location Raleigh, North Carolina, US Winchester, Virginia, US