v3.26.1
Document And Entity Information - shares
 3 Months Ended
Mar. 31, 2026
May 14, 2026
Document Information [Line Items]    
Entity Central Index Key 0001502377  
Entity Registrant Name CONTANGO SILVER & GOLD INC.  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2026  
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 001-35770  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 27-3431051  
Entity Address, Address Line One 516 2nd Avenue, Suite 401  
Entity Address, City or Town Fairbanks  
Entity Address, State or Province AK  
Entity Address, Postal Zip Code 99701  
City Area Code 907  
Local Phone Number 388-7770  
Title of 12(b) Security Common Stock, Par Value $0.01 per share  
Trading Symbol CTGO  
Security Exchange Name NYSE  
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  
Entity Common Stock, Shares Outstanding   30,771,211