{"cik":711034,"taxonomy":"us-gaap","tag":"OtherAssetsNoncurrent","label":"Other Assets, Noncurrent","description":"Amount of noncurrent assets classified as other.","entityName":"THUNDER MOUNTAIN GOLD, INC.","units":{"USD":[{"end":"2025-12-31","val":0,"accn":"0001062993-26-004378","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-08-14","frame":"CY2025Q4I"},{"end":"2026-06-30","val":5000,"accn":"0001062993-26-004378","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-08-14","frame":"CY2026Q2I"}]}}