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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