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Summary of significant accounting policies (Policies) | 9 Months Ended
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Sep. 30, 2021
Summary of significant accounting policies |
Basis of preparation | 2.1 Basis of preparation ​ The Company prepared these unaudited consolidated financial statements in compliance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Any reference in these notes to applicable guidance is meant to refer to authoritative U.S. GAAP as found in the Accounting Standards Codification (“ASC”) and Accounting Standards Update (“ASU”) of the Financial Accounting Standards Board (“FASB”). ​ The unaudited consolidated financial statements are presented in U.S. dollars, except where otherwise indicated. Transactions denominated in currencies other than U.S. dollars are presented in the transaction currency with the U.S. dollar amount included in parenthesis, converted at the foreign exchange rate as of the transaction date.
Unaudited interim financial information | 2.2 Unaudited interim financial information ​ The interim financial statements and related disclosures are unaudited, have been prepared on the same basis as the annual financial statements and, in the opinion of management, reflect all adjustments, which include only normal recurring adjustments, necessary for a fair statement of the financial position, results of operations and changes in financial position for the period presented. ​ Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with U.S. GAAP have been omitted. The results of operations for the nine months ended September 30, 2021, are not necessarily indicative of the results to be expected for the full year ending December 31, 2021, or for any other future year or interim period. The accompanying financial statements should be read in conjunction with the audited financial statements and the related notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020, filed with the SEC on March 1, 2021.
Use of estimates | 2.3 Use of estimates ​ The preparation of the financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates.
Accounting policies | 2.4 Accounting policies ​ The principal accounting policies applied in the preparation of these unaudited consolidated financial statements are described in the Company’s audited financial statements as of and for the year ended December 31, 2020, and the notes thereto, which are included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020, filed with the SEC on March 1, 2021. There have been no material changes in the Company’s significant accounting policies during the nine months ended September 30, 2021, except as noted below. ​ Revenue recognition – CSL Behring Agreement ​ The Company determined its revenue recognition policies related to the CSL Behring Agreement (defined below) when the CSL Behring Agreement became fully effective on May 6, 2021. Refer to Note 4 “Collaboration arrangements and concentration of credit risk” for further detail. ​ Earnings per ordinary share ​ The Company recognized net income for the first time in 2021. The Company had a net loss for the three months ended September 30, 2021. Net income / (loss) per ordinary share was calculated in accordance with ASC 260, Earnings Per Share. Refer to Note 13 “Basic and diluted earnings per share” for further detail. ​ Corlieve transaction ​ The Company acquired Corlieve Therapeutics SAS (“Corlieve”) on July 30, 2021. The Company determined the accounting for this transaction in accordance with ASC 805, Business Combination. Refer to Note 3 “Corlieve transaction” for further detail. ​
Recent accounting pronouncements | 2.5 Recent accounting pronouncements ​ There have been no new accounting pronouncements or changes to accounting pronouncements during the nine months ended September 30, 2021, as compared to the recent accounting pronouncements described in Note 2.3.22 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2020, which could be expected to materially impact the Company’s unaudited consolidated financial statements.

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