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Document And Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2022
Mar. 31, 2023
Jun. 30, 2022
Document And Entity Information [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2022    
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 2022    
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     $ 53,478,191
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   4,575,038  
Documents Incorporated by Reference DOCUMENTS INCORPORATED BY REFERENCE

Portions of the 2023 Proxy Statement to be used in conjunction with the Annual Meeting of Shareholders, scheduled to be held on May 16, 2023, are incorporated by reference into Part III of this Form 10-K

    
ICFR Auditor Attestation Flag false    
Auditor Firm Id 613    
Auditor Name Yount, Hyde & Barbour    
Auditor Location Winchester, Virginia, US