v3.26.1
Cover - USD ($)
12 Months Ended
Dec. 31, 2025
Mar. 31, 2026
Jun. 30, 2025
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2025    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2025    
Current Fiscal Year End Date --12-31    
Entity File Number 000-24379    
Entity Registrant Name ATLANTICA, INC.    
Entity Central Index Key 0001062506    
Entity Tax Identification Number 43-0976473    
Entity Incorporation, State or Country Code UT    
Entity Address, Address Line One c/o Richland    
Entity Address, Address Line Two Gordon & Company    
Entity Address, Address Line Three 11450 SE Dixie Highway    
Entity Address, City or Town Hobe Sound    
Entity Address, State or Province FL    
Entity Address, Postal Zip Code 33455    
City Area Code (772)    
Local Phone Number 545-9002    
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 true    
Elected Not To Use the Extended Transition Period false    
Entity Shell Company true    
Entity Public Float     $ 49.17
Entity Common Stock, Shares Outstanding   2,458,590  
Document Financial Statement Error Correction [Flag] false    
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block] We are not currently engaged in any substantive business activity except the search for potential assets, property or businesses to acquire, and we have no current plans to engage in any other activity in the foreseeable future unless and until we complete any such acquisition. In our present form, we are deemed to be a “shell company” seeking to acquire or merge with a business or company. Therefore, we do not consider that we face significant cybersecurity risk and have not adopted any cybersecurity risk management program or formal processes for assessing cybersecurity risk. Our board of directors is generally responsible for the oversight of risks from cybersecurity threats, if any. We have not encountered any cybersecurity incidents. If and when we commence any operations, our board of directors will consider what they deem as a reasonable cybersecurity risk management program or formal processes for assessing cybersecurity risk.    
Auditor Name Haynie & Company    
Auditor Location Salt Lake City Utah    
Auditor Firm ID 457