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Document And Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2024
Apr. 21, 2025
Jun. 30, 2024
Document Information [Line Items]      
Entity Central Index Key 0001494582    
Entity Registrant Name BOSTON OMAHA CORPORATION    
Amendment Flag true    
Current Fiscal Year End Date --12-31    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2024    
Document Type 10-K/A    
Amendment Description This Amendment No. 1 on Form 10-K/A (the “Amendment”) amends the Annual Report on Form 10-K (the “ Original Form 10-K”) of Boston Omaha Corporation (the “Company”) for the fiscal year ended December 31, 2024 (the “2024 Fiscal Year”), as filed with the Securities and Exchange Commission (the “SEC”) on March 28, 2025. We are filing this Amendment to amend Part III of the Original Form 10-K to include the information required by and not included in Part III of the Original Form 10-K because we do not intend to file an annual meeting definitive proxy statement within 120 days of December 31, 2024.   Accordingly, this Amendment No. 1 to Form 10-K (“Amendment”) is being filed solely to:    
Document Annual Report true    
Document Period End Date Dec. 31, 2024    
Document Transition Report false    
Entity File Number 001-38113    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 27-0788438    
Entity Address, Address Line One 1601 Dodge Street, Suite 3300    
Entity Address, City or Town Omaha    
Entity Address, State or Province NE    
Entity Address, Postal Zip Code 68102    
City Area Code 857    
Local Phone Number 256-0079    
Title of 12(b) Security Class A common stock, $0.001 par value per share    
Trading Symbol BOC    
Security Exchange Name NYSE    
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    
Entity Shell Company false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Public Float     $ 325,359,669
Auditor Name KPMG LLP    
Auditor Location Omaha, Nebraska    
Auditor Firm ID 185    
Common Class B [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   580,558  
Common Class A [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   30,872,876