v3.26.3
Document And Entity Information - shares
 6 Months Ended
Jun. 30, 2026
Sep. 24, 2026
Document Information [Line Items]    
Entity Central Index Key 0002033770  
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2026  
Document Fiscal Year Focus 2026  
Document Transition Report false  
Entity File Number 001-42711  
Entity Registrant Name CID HOLDCO, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 99-2578850  
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  
City Area Code +1 (303)  
Local Phone Number 332 4122  
Entity Current Reporting Status No  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   2,337,767
Amendment Flag false  
Document Fiscal Period Focus Q2  
Current Fiscal Year End Date --12-31  
Common Stock, par value of $0.0001 per share    
Document Information [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 $287.5 per share [Member]    
Document Information [Line Items]    
Title of 12(b) Security Warrants, each exercisable for one share of Common Stock at an exercise price of $287.5 per share  
Trading Symbol DAICW  
Security Exchange Name NASDAQ