v3.25.2
Cover
 6 Months Ended
Jun. 30, 2025
shares
Document Information [Line Items]  
Document Type 10-Q
Document Quarterly Report true
Document Transition Report false
Entity Interactive Data Current Yes
Amendment Flag false
Document Period End Date Jun. 30, 2025
Document Fiscal Year Focus 2025
Document Fiscal Period Focus Q2
Entity Information [Line Items]  
Entity Registrant Name Columbus Acquisition Corp/Cayman Islands
Entity Central Index Key 0002028201
Entity File Number 001-42485
Entity Tax Identification Number 00-0000000
Entity Incorporation, State or Country Code E9
Current Fiscal Year End Date --12-31
Entity Current Reporting Status Yes
Entity Shell Company true
Entity Filer Category Non-accelerated Filer
Entity Small Business true
Entity Emerging Growth Company true
Entity Ex Transition Period false
Entity Contact Personnel [Line Items]  
Entity Address, Address Line One 14 Prudential Tower
Entity Address, City or Town Singapore
Entity Address, Country SG
Entity Address, Postal Zip Code 049712
Entity Phone Fax Numbers [Line Items]  
City Area Code (+1)
Local Phone Number 949 899 1827
Entity Listings [Line Items]  
Entity Common Stock, Shares Outstanding 7,944,290
Units, consisting of one ordinary share, $0.0001 par value, and one Right to acquire one-seventh of one ordinary share  
Entity Listings [Line Items]  
Title of 12(b) Security Units, consisting of one Ordinary Share, $0.0001 par value, and one Right to acquire one-seventh of one Ordinary Share
Trading Symbol COLAU
Security Exchange Name NASDAQ
Ordinary shares, par value $0.0001 per share  
Entity Listings [Line Items]  
Title of 12(b) Security Ordinary shares, par value $0.0001 per share
Trading Symbol COLA
Security Exchange Name NASDAQ
Rights, each whole right to acquire one-seventh of one ordinary share  
Entity Listings [Line Items]  
Title of 12(b) Security Rights, each whole right to acquire one-seventh of one ordinary share
Trading Symbol COLAR
Security Exchange Name NASDAQ