{"cik":2089982,"taxonomy":"us-gaap","tag":"LiabilitiesAndStockholdersEquity","label":"Liabilities and Equity","description":"Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any.","entityName":"HCM IV Acquisition Corp.","units":{"USD":[{"end":"2025-12-31","val":160959,"accn":"0001213900-26-035836","fy":2025,"fp":"FY","form":"10-K","filed":"2026-03-30","frame":"CY2025Q4I"}]}}