{"cik":1742518,"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":"MMTEC, INC.","units":{"USD/shares":[{"start":"2019-01-01","end":"2019-12-31","val":-0.11,"accn":"0001213900-22-021197","fy":2021,"fp":"FY","form":"20-F","filed":"2022-04-22","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":-0.16,"accn":"0001213900-22-021197","fy":2021,"fp":"FY","form":"20-F","filed":"2022-04-22"},{"start":"2020-01-01","end":"2020-12-31","val":-1.56,"accn":"0001213900-23-029574","fy":2022,"fp":"FY","form":"20-F","filed":"2023-04-13","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":-0.29,"accn":"0001213900-22-021197","fy":2021,"fp":"FY","form":"20-F","filed":"2022-04-22"},{"start":"2021-01-01","end":"2021-12-31","val":-2.88,"accn":"0001213900-23-029574","fy":2022,"fp":"FY","form":"20-F","filed":"2023-04-13","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":-1.61,"accn":"0001213900-23-029574","fy":2022,"fp":"FY","form":"20-F","filed":"2023-04-13","frame":"CY2022"},{"start":"2024-01-01","end":"2024-06-30","val":-0.14,"accn":"0001213900-25-086559","fy":2025,"fp":"Q2","form":"6-K","filed":"2025-09-10"},{"start":"2025-01-01","end":"2025-06-30","val":-1.84,"accn":"0001213900-25-086559","fy":2025,"fp":"Q2","form":"6-K","filed":"2025-09-10"},{"start":"2025-01-01","end":"2025-06-30","val":-1.84,"accn":"0001213900-26-088375","fy":2026,"fp":"Q2","form":"6-K","filed":"2026-08-12"},{"start":"2026-01-01","end":"2026-06-30","val":-0.02,"accn":"0001213900-26-088375","fy":2026,"fp":"Q2","form":"6-K","filed":"2026-08-12"}]}}