Subsequent Event	9 Months Ended
Sep. 30, 2023
Subsequent Events [Abstract]
Subsequent Event	16. Subsequent Event Acquisition of Metenova Holding AB On October 2, 2023, Repligen Sweden AB, a subsidiary of the Company completed its acquisition of all of the outstanding equity interests in Metenova Holding AB ("Metenova"), pursuant to a Share Sale and Purchase Agreement with, inter alia, Metenova for approximately $173 million in cash and the Company's equity. Metenova will further strengthen our fluid management portfolio with its magnetic mixing and drive train technologies that are widely used by global biopharmaceutical companies and contract development and manufacturing organizations. The Company will account for the acquisition of Metenova as a purchase of business under the acquisition method of accounting and has engaged a third-party valuation firm to assist with the valuation of the business acquired. The estimated purchase price allocation for the acquisition of Metenova will be included in the Annual Report on Form 10-K for the year ended December 31, 2023.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/855/tableOfContent

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

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