Summary of Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2025
Accounting Policies [Abstract]
Basis of Presentation and Use of Estimates	Basis of Presentation and Use of Estimates The unaudited interim condensed consolidated financial statements of the Company included herein have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) as found in the Accounting Standards Codification (“ASC”), Accounting Standards Update (“ASU”) of the Financial Accounting Standards Board (“FASB”) and the rules and regulations of the SEC. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted from this report, as is permitted by such SEC rules and regulations. Accordingly, these unaudited condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and the notes thereto for the year ended December 31, 2024 included in the Company’s Annual Report on Form 10-K filed with the SEC on March 6, 2025.
Unaudited Interim Financial Information	Unaudited Interim Financial Information The accompanying condensed consolidated balance sheet as of March 31, 2025, the condensed consolidated statements of operations and comprehensive loss for the three months ended March 31, 2025 and 2024, the condensed consolidated statements of stockholders’ equity for the three months ended March 31, 2025 and 2024, and the condensed consolidated statements of cash flows for the three months ended March 31, 2025 and 2024 are unaudited. The unaudited interim financial statements have been prepared on the same basis as the audited annual 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, the results of its operations for the three months ended March 31, 2025 and 2024 and its cash flows for the three months ended March 31, 2025 and 2024. 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, or any other interim period.
Principles of Consolidation	Principles of Consolidation The condensed consolidated financial statements include the accounts of Atea Pharmaceuticals, Inc. and its wholly-owned subsidiary, Atea Pharmaceuticals Securities Corporation. All intercompany amounts have been eliminated in consolidation.
Significant Accounting Policies	Significant Accounting Policies The significant accounting policies used in the preparation of these condensed consolidated financial statements are consistent with those as described in the Annual Report on Form 10-K for the year ended December 31, 2024 filed with the SEC on March 6, 2025.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements From time to time, new accounting pronouncements are issued by the FASB or other standard setting bodies that the Company adopts as of the specified effective date. The Company does not believe that the adoption of recently issued standards have or may have a material impact on its condensed consolidated financial statements and disclosures.

Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2025

Basis of Presentation and Use of Estimates

The unaudited interim condensed consolidated financial statements of the Company included herein have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) as found in the Accounting Standards Codification (“ASC”), Accounting Standards Update (“ASU”) of the Financial Accounting Standards Board (“FASB”) and the rules and regulations of the SEC. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted from this report, as is permitted by such SEC rules and regulations. Accordingly, these unaudited condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and the notes thereto for the year ended December 31, 2024 included in the Company’s Annual Report on Form 10-K filed with the SEC on March 6, 2025.

Unaudited Interim Financial Information

The accompanying condensed consolidated balance sheet as of March 31, 2025, the condensed consolidated statements of operations and comprehensive loss for the three months ended March 31, 2025 and 2024, the condensed consolidated statements of stockholders’ equity for the three months ended March 31, 2025 and 2024, and the condensed consolidated statements of cash flows for the three months ended March 31, 2025 and 2024 are unaudited. The unaudited interim financial statements have been prepared on the same basis as the audited annual 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, the results of its operations for the three months ended March 31, 2025 and 2024 and its cash flows for the three months ended March 31, 2025 and 2024. 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, or any other interim period.

Principles of Consolidation

The condensed consolidated financial statements include the accounts of Atea Pharmaceuticals, Inc. and its wholly-owned subsidiary, Atea Pharmaceuticals Securities Corporation. All intercompany amounts have been eliminated in consolidation.

Significant Accounting Policies

The significant accounting policies used in the preparation of these condensed consolidated financial statements are consistent with those as described in the Annual Report on Form 10-K for the year ended December 31, 2024 filed with the SEC on March 6, 2025.

Recently Issued Accounting Pronouncements

From time to time, new accounting pronouncements are issued by the FASB or other standard setting bodies that the Company adopts as of the specified effective date. The Company does not believe that the adoption of recently issued standards have or may have a material impact on its condensed consolidated financial statements and disclosures.