Description of Business and Liquidity	9 Months Ended
Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business and Liquidity	Description of Business and Liquidity [A] Description of Business Immunovant, Inc. (together with its wholly owned subsidiaries, the “Company” or “Immunovant”) is a clinical-stage biopharmaceutical company dedicated to enabling normal lives for people with autoimmune diseases. The Company’s innovative product pipeline includes batoclimab, formerly referred to as IMVT-1401, and IMVT-1402, both of which are novel, fully human, monoclonal antibodies that target the neonatal fragment crystallizable receptor (“FcRn”). Designed to be optimized as a simple, subcutaneous injection with dosing that the Company believes can be tailored based on disease severity and stage, batoclimab has been observed to reduce immunoglobulin G (“IgG”) antibodies that cause inflammation and disease. IMVT-1402 has also demonstrated deep IgG antibody reduction in animal studies. The Company has determined that it has one operating and reporting segment. [B] Liquidity The Company has incurred significant losses and negative cash flows from operations since its inception. As of December 31, 2022, the Company’s cash and cash equivalents totaled $432.6 million and its accumulated deficit was $506.9 million. The Company has not generated any revenues to date and does not anticipate generating any revenues unless and until it successfully completes development and obtains regulatory approval for batoclimab, IMVT-1402 or any future product candidate. Management expects to incur additional losses in the future to fund its operations and conduct product research and development and recognizes the need to raise additional capital to fully implement its business plan. The Company intends to raise such additional capital through the issuance of equity securities, debt financings or other sources in order to further implement its business plan. However, if such financing is not available at adequate levels, the Company will need to reevaluate its operating plan and may be required to delay the development of its product candidates. The Company currently expects that its existing cash and cash equivalents as of December 31, 2022 will be sufficient to fund its operating expenses and capital expenditure requirements for at least the next 12 months from the date these unaudited condensed consolidated financial statements are issued.

Immunovant, Inc. (together with its wholly owned subsidiaries, the “Company” or “Immunovant”) is a clinical-stage biopharmaceutical company dedicated to enabling normal lives for people with autoimmune diseases. The Company’s innovative product pipeline includes batoclimab, formerly referred to as IMVT-1401, and IMVT-1402, both of which are novel, fully human, monoclonal antibodies that target the neonatal fragment crystallizable receptor (“FcRn”). Designed to be optimized as a simple, subcutaneous injection with dosing that the Company believes can be tailored based on disease severity and stage, batoclimab has been observed to reduce immunoglobulin G (“IgG”) antibodies that cause inflammation and disease. IMVT-1402 has also demonstrated deep IgG antibody reduction in animal studies.

The Company has incurred significant losses and negative cash flows from operations since its inception. As of December 31, 2022, the Company’s cash and cash equivalents totaled $432.6 million and its accumulated deficit was $506.9 million.

The Company has not generated any revenues to date and does not anticipate generating any revenues unless and until it successfully completes development and obtains regulatory approval for batoclimab, IMVT-1402 or any future product candidate. Management expects to incur additional losses in the future to fund its operations and conduct product research and development and recognizes the need to raise additional capital to fully implement its business plan.

The Company intends to raise such additional capital through the issuance of equity securities, debt financings or other sources in order to further implement its business plan. However, if such financing is not available at adequate levels, the Company will need to reevaluate its operating plan and may be required to delay the development of its product candidates. The Company currently expects that its existing cash and cash equivalents as of December 31, 2022 will be sufficient to fund its operating expenses and capital expenditure requirements for at least the next 12 months from the date these unaudited condensed consolidated financial statements are issued.