{"cik":2019804,"taxonomy":"us-gaap","tag":"IncreaseDecreaseInAccountsReceivable","label":"Increase (Decrease) in Accounts Receivable","description":"The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.","entityName":"TERRESTRIAL ENERGY INC.","units":{"USD":[{"start":"2024-01-01","end":"2024-12-31","val":-19163,"accn":"0001104659-26-036846","fy":2025,"fp":"FY","form":"10-K","filed":"2026-03-30"},{"start":"2024-01-01","end":"2024-12-31","val":-19163,"accn":"0001104659-26-071014","fy":null,"fp":null,"form":"POS AM","filed":"2026-06-05","frame":"CY2024"}]}}