{"cik":2137777,"taxonomy":"us-gaap","tag":"EarningsPerShareBasic","label":"Earnings Per Share, Basic","description":"The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.","entityName":"Research Alliance Corporation IV","units":{"USD/shares":[{"start":"2026-04-01","end":"2026-06-30","val":-0.03,"accn":"0001193125-26-356882","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-08-19","frame":"CY2026Q2"}]}}