Subsequent Events	9 Months Ended
Subsequent Events	Dec. 31, 2025
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Sales of Common Stock Pursuant to At-The-Market Facility In January 2026, pursuant to the 2023 Sales Agreement, the Company issued and sold an aggregate of 2,940,452 shares of its common stock, resulting in net proceeds of $20.8 million. Debt Amendment In January 2026, a third amendment was made to the Company's Loan Agreement (the "Third Amendment") with Hercules on January 29, 2026 pursuant to which the Company drew down the tranche 3 loan advance amount of $35.0 million. The Third Amendment maintained a $200.0 million maximum principal amount and re-allocated the future tranches extending through December 2027, subject to the terms and conditions of the Loan Agreement. In addition, the Third Amendment extended the amortization date, with a balloon payment, inclusive of accrued interest and principal due on the maturity date of October 1, 2027. The Amendment provides that if the Company receives FDA approval prior to October 1, 2027, the amortization and maturity date shall be extended to October 1, 2029. Borrowings under the Loan Agreement are repayable in monthly interest-only payments through September 2027, with the outstanding principal balance of the Term Loan Facility bearing interest payable in cash at a rate per annum equal to the greater of (i) 8.50% and (ii) the Prime Rate plus 1.75%. In addition, the Third Amendment extended the financial covenant date to be the later of (i) July 1, 2026 and (ii) the date on which the aggregate outstanding principal amount of the Term Loan Facility is equal to or greater than $100.0 million

Replimune Group, Inc. 10-Q