{"cik":2021880,"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":"HMH Holding Inc","units":{"USD/shares":[{"start":"2025-01-01","end":"2025-03-31","val":30560,"accn":"0001628280-26-031295","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-05-06","frame":"CY2025Q1"},{"start":"2026-01-01","end":"2026-03-31","val":17240,"accn":"0001628280-26-031295","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-05-06","frame":"CY2026Q1"}]}}