{"cik":1918102,"taxonomy":"us-gaap","tag":"OtherAssetsCurrent","label":"Other Assets, Current","description":"Amount of current assets classified as other.","entityName":"Deep Fission, Inc.","units":{"USD":[{"end":"2026-03-31","val":39275,"accn":"0001104659-26-057835","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-05-08"},{"end":"2026-06-30","val":43000,"accn":"0001104659-26-089884","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-08-03","frame":"CY2026Q2I"}]}}