v3.26.1
Cover - shares
6 Months Ended
Jun. 30, 2026
Aug. 17, 2026
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Jun. 30, 2026  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2026  
Current Fiscal Year End Date --12-31  
Entity File Number 001-42750  
Entity Registrant Name NEXMETALS MINING CORP.  
Entity Central Index Key 0000795800  
Entity Tax Identification Number 00-0000000  
Entity Incorporation, State or Country Code Z4  
Entity Address, Address Line One 1111 West Hastings Street  
Entity Address, Address Line Two 15th Floor  
Entity Address, City or Town Vancouver  
Entity Address, State or Province BC  
Entity Address, Country CA  
Entity Address, Postal Zip Code V6E 2J3  
City Area Code 1-866  
Local Phone Number 794-6396  
Title of 12(b) Security Common Shares, no par value  
Trading Symbol NEXM  
Security Exchange Name NASDAQ  
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   35,648,164