| Cover Page - USD ($) | 12 Months Ended | | |
| Dec. 31, 2022 | Mar. 07, 2023 | Jun. 30, 2022 |
| Document Information [Line Items] | | | |
| Document Type | 10-K/A | | |
| Document Annual Report | true | | |
| Document Period End Date | Dec. 31, 2022 | | |
| Current Fiscal Year End Date | --12-31 | | |
| Document Transition Report | false | | |
| Entity File Number | 001-40592 | | |
| Entity Registrant Name | Rapid Micro Biosystems, Inc. | | |
| Entity Incorporation, State or Country Code | DE | | |
| Entity Tax Identification Number | 20-8121647 | | |
| Entity Address, Address Line One | 1001 Pawtucket Boulevard West, | | |
| Entity Address, Address Line Two | Suite 280 | | |
| Entity Address, City or Town | Lowell | | |
| Entity Address, State or Province | MA | | |
| Entity Address, Postal Zip Code | 01854 | | |
| City Area Code | 978 | | |
| Local Phone Number | 349-3200 | | |
| Title of 12(b) Security | Class A common stock, $0.01 par valueper share | | |
| Trading Symbol | RPID | | |
| Security Exchange Name | NASDAQ | | |
| Entity Well-known Seasoned Issuer | No | | |
| Entity Voluntary Filers | No | | |
| Entity Current Reporting Status | Yes | | |
| Entity Interactive Data Current | Yes | | |
| Entity Filer Category | Non-accelerated Filer | | |
| Entity Small Business | true | | |
| Entity Emerging Growth Company | true | | |
| Entity Ex Transition Period | false | | |
| ICFR Auditor Attestation Flag | false | | |
| Entity Shell Company | false | | |
| Entity Public Float | | | $ 24,145,209 |
| Documents Incorporated by Reference | Portions of the registrant’s definitive Proxy Statement relating to its 2023 Annual Meeting of Stockholders to be filed with the SEC within 120 days after the end of the fiscal year ended December 31, 2022 are incorporated herein by reference in Part III. | | |
| Amendment Description | Rapid Micro Biosystems, Inc. (the “Company”) is filing this Amendment No. 1 (the “Amendment”) to its Annual Report on Form 10-K for the fiscal year ended December 31, 2022, as filed with the Securities and Exchange Commission (the “SEC”) on March 10, 2023 (the “Original 10-K”), solely for the purpose of filing revised versions of Exhibits 31.1 and 31.2 filed with the Original 10-K.The Company is filing revised Exhibits 31.1 and 31.2 solely in order to include certification language that was inadvertently omitted from such exhibits when originally filed: (i) the introductory language in paragraph 4 that refers to the certifying officer’s responsibility for establishing and maintaining internal control over financial reporting for the Company; and (ii) paragraph 4(b) regarding the design of internal control over financial reporting. The Amendment does not reflect events occurring after the date of the filing of the Original 10-K or modify or update any of the other disclosures contained therein in any way. Accordingly, the Amendment should be read in conjunction with the Original 10-K. The Amendment consists solely of the preceding cover page, this explanatory note, the signature page and paragraphs 1, 2, 4 and 5 of each of the revised certifications filed as exhibits to the Amendment. | | |
| Entity Central Index Key | 0001380106 | | |
| Document Fiscal Year Focus | 2022 | | |
| Document Fiscal Period Focus | FY | | |
| Amendment Flag | true | | |
| Auditor Location | Boston, Massachusetts | | |
| Class A Common Stock | | | |
| Document Information [Line Items] | | | |
| Entity Common Stock, Shares Outstanding (in shares) | | 36,635,108 | |
| Class B Common Stock | | | |
| Document Information [Line Items] | | | |
| Entity Common Stock, Shares Outstanding (in shares) | | 5,553,379 | |
