{"cik":730272,"taxonomy":"us-gaap","tag":"ContractWithCustomerLiabilityCurrent","label":"Contract with Customer, Liability, Current","description":"Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.","entityName":"REPLIGEN CORP","units":{"USD":[{"end":"2025-12-31","val":14609000,"accn":"0001628280-26-068562","fy":2026,"fp":"Q3","form":"10-Q","filed":"2026-10-30","frame":"CY2025Q4I"},{"end":"2026-09-30","val":15788000,"accn":"0001628280-26-068562","fy":2026,"fp":"Q3","form":"10-Q","filed":"2026-10-30","frame":"CY2026Q3I"}]}}