v3.25.2
Cover - shares
 6 Months Ended
Jun. 30, 2025
Aug. 19, 2025
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 CID HOLDCO, INC.  
Entity Central Index Key 0002033770  
Entity File Number 001-42711  
Entity Tax Identification Number 99-2578850  
Entity Incorporation, State or Country Code DE  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status No  
Entity Shell Company false  
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 5661 S Cameron St  
Entity Address, Address Line Two Suite 100  
Entity Address, City or Town Las Vegas  
Entity Address, State or Province NV  
Entity Address, Postal Zip Code 89118  
Entity Phone Fax Numbers [Line Items]    
City Area Code +1 (303)  
Local Phone Number 332 4122  
Entity Listings [Line Items]    
Entity Common Stock, Shares Outstanding   27,636,939
Common Stock, par value of $0.0001 per share    
Entity Listings [Line Items]    
Title of 12(b) Security Common Stock, par value of $0.0001 per share  
Trading Symbol DAIC  
Security Exchange Name NASDAQ  
Warrants, each exercisable for one share of Common Stock at an exercise price of $11.50 per share    
Entity Listings [Line Items]    
Title of 12(b) Security Warrants, each exercisable for one share of Common Stock at an exercise price of $11.50 per share  
Trading Symbol DAICW  
Security Exchange Name NASDAQ