Nature of the business and basis of presentation	3 Months Ended
Nature of the business and basis of presentation	Mar. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of the business and basis of presentation	Nature of the business and basis of presentation Rapid Micro Biosystems, Inc. (the “Company”) was incorporated under the laws of the State of Delaware on December 29, 2006. The Company develops, manufactures, markets and sells Growth Direct systems (“Systems”) proprietary consumables, laboratory information management system (“LIMS”) connection software, and services to address rapid microbial analysis used for quality control in the manufacture of pharmaceuticals, medical devices and personal care products. The Company’s technology uses a highly sensitive camera and the natural auto fluorescence of living cells to identify and quantify microbial growth faster and more accurately than the traditional method, which relies on the human eye. The Company currently sells to customers in North America, Europe and the Asia-Pacific region. The Company is headquartered in Lexington, Massachusetts. Basis of presentation These condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) and include the accounts of the Company and its wholly owned subsidiaries in Germany and Switzerland. All intercompany accounts and transactions have been eliminated in consolidation. Certain information and note disclosures normally included in the consolidated financial statements prepared in accordance with GAAP have been condensed or omitted. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s audited consolidated financial statements for the year ended December 31, 2024. Any reference in these notes to applicable guidance is meant to refer to the authoritative GAAP as found in the Accounting Standards Codification (“ASC”) and Accounting Standards Update (“ASU”) of the Financial Accounting Standards Board (“FASB”). The unaudited interim condensed consolidated financial statements have been prepared on the same basis as the audited annual consolidated financial statements and, in the opinion of management, reflect all adjustments, which include only normal recurring adjustments, necessary for the fair statement of the Company’s financial position as of March 31, 2025 and the results of its operations and its cash flows for the three months ended March 31, 2025 and 2024. The financial data and other information disclosed in these notes related to the three months ended March 31, 2025 and 2024 are also unaudited. The results for the three months ended March 31, 2025 are not necessarily indicative of results to be expected for the year ending December 31, 2025, any other interim periods, or any future year or period. Liquidity The Company has incurred recurring losses and net cash outflows from operations since its inception. The Company expects to continue to generate operating losses in the near to medium term. To date, the Company has funded operations primarily through proceeds from sales of redeemable convertible preferred stock, borrowings under loan agreements, revenue from sales of our products and services, and proceeds from our Company's initial public offering ("IPO"). If the Company's expectations and underlying assumptions of business performance, including revenue growth, gross margin improvement, and control of operating costs, are not realized, the Company may need to reduce spending or raise additional funding which could be through equity offerings, debt financings or a combination thereof. For example, on December 15, 2023, the Company entered into a sales agreement, or the ATM Agreement, to establish an "at-the-market" facility with Cowen and Company, LLC, or Cowen, pursuant to which the Company may issue and sell shares of its Class A common stock. During the three months ended March 31, 2025 through the filing date of this Quarterly Report, the Company did not issue or sell any shares of its Class A common stock under this facility. If the Company is unable to raise capital as, if and when, needed, the Company may have to significantly delay, scale back or discontinue its expansion plans including further development and commercialization efforts of one or more of its products. The Company expects that its existing cash, cash equivalents and investments will be sufficient to fund its operating expenses and capital expenditure requirements for at least twelve months following the date these consolidated financial statements were issued.