Summary of Significant Accounting Policies (Policies) |
6 Months Ended |
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Jun. 30, 2026 | |
| Accounting Policies [Abstract] | |
| Basis of preparation and principles of consolidation | Basis of preparation and principles of consolidation These accompanying unaudited condensed consolidated financial statements, which include the accounts of the Company and its wholly-owned subsidiaries, have been prepared following the requirements of the U.S. Securities and Exchange Commission for interim reporting. As permitted under those rules, certain footnotes and other financial information that are normally required by U.S. generally accepted accounting principles, or U.S. GAAP, can be condensed or omitted. All intercompany transactions and balances have been eliminated in consolidation. The information included in this Quarterly Report on Form 10‑Q should be read in conjunction with our annual audited consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10‑K for the year ended December 31, 2025. In the opinion of management, these condensed consolidated financial statements have been prepared on the same basis as the annual audited consolidated financial statements and include all adjustments, consisting only of normal recurring adjustments, considered necessary for the fair statement of our financial position and operating results. The results for the three and six months ended June 30, 2026 are not necessarily indicative of the results to be expected for the year ending December 31, 2026, for any other interim period or for any future period. The Company’s significant accounting policies have not changed substantially from those previously described in the Company’s Annual Report on Form 10‑K for the year ended December 31, 2025.
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| Use of Estimates | Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosures in the consolidated financial statements and accompanying notes. Management bases its estimates on historical experience and on assumptions believed to be reasonable under the circumstances. Actual results could differ materially from those estimates.
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| Loan Modifications and Extinguishments | Loan Modifications and Extinguishments On February 18, 2026, the Company entered into an amendment to its royalty purchase agreement with certain entities managed by HealthCare Royalty Management, LLC ("HCR"). Prior to the amendment, the agreement was accounted for as a debt obligation. The Company evaluates amendments, restructurings, or other changes to its loan agreements in accordance with ASC 470-50, Debt — Modifications and Extinguishments. Under this guidance, we determine whether the revised terms represent a modification of the existing debt or an extinguishment of the old debt and issuance of new debt. If the changes are not deemed substantial, the transaction is accounted for as a modification and any associated fees or costs with the lender are amortized over the remaining term of the modified debt. If the changes are deemed to be substantial, the original debt is considered extinguished, and the new debt is recorded at fair value and any resulting difference between the carrying amount of the old debt and the fair value of the new debt is recognized in earnings as a gain or loss on extinguishment. When the Company repays an existing debt obligation using the proceeds from a contemporaneous issuance of new debt to a different lender, we account for the transaction as a debt extinguishment.
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| Cost of product sales | Cost of product sales Cost of product sales includes costs directly and indirectly relating to the manufacture of ZYNLONTA commercial drug substance and drug product, including the third-party manufacture costs of our contract manufacturing organizations (“CMOs”), as well as internal personnel costs, including share-based compensation, associated with the production of ZYNLONTA. Cost of product sales also includes royalties payable to a collaboration partner based on net product sales of ZYNLONTA, idle capacity costs, and inventory write-downs for changes in reserves for excess inventory or write-offs of inventory that fail to meet specification. We expect that cost of product sales will continue to increase over time as we sell through pre-approval inventory that was previously expensed prior to commercialization under U.S. GAAP. Factors such as inflation, tariffs and other external factors may also increase our cost of product sales.
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| Recent Accounting Pronouncements | Recent Accounting Pronouncements New accounting pronouncements which have been adopted We adopted FASB ASU-2025-05, Financial Instruments — Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets to simplify the estimation of credit losses on current accounts receivable and current contract assets arising from transactions accounted for under ASC 606, effective for fiscal years beginning in January 2026, including interim periods within those fiscal years. The ASU provides a practical expedient permitting an entity to assume that conditions at the balance sheet date remain unchanged over the life of the asset when estimating expected credit losses for current classified accounts receivable and contract assets. We adopted the practical expedient on a prospective basis for the quarterly and annual reports for the fiscal year beginning on January 1, 2026. Adoption of this standard did not have a material impact on our financial statements or disclosures. Issued but not yet adopted In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses Disclosure. The ASU requires disaggregation, in the notes to the financial statements, of certain cost and expense captions presented on the face of the Company’s interim and annual financial statements. ASU 2023-09 is effective for fiscal years beginning in January 2027 and interim periods beginning January 2028, with early adoption permitted. Adoption may be applied prospectively or retrospectively. The Company does not anticipate that the adoption of this standard will have a material impact on our financial statements but may result in enhanced or expanded disclosures. In December 2025, the FASB issued ASU 2025-11, Interim Reporting (Topic 270): Narrow-Scope Improvements. The ASU clarifies interim disclosure requirements, the applicability of ASC 270 and the form and content of interim financial statements in accordance with U.S. GAAP. The objective of the amendments is to provide further clarity about the current interim disclosure requirements. The ASU is effective for interim reporting periods within fiscal years beginning in January 2028. Adoption of this ASU may be applied prospectively or retrospectively. The Company is currently evaluating the impact of the ASU, but does not anticipate the adoption of this standard to have a material impact on our financial statements. In December 2025, the FASB issued ASU 2025-12, Codification Improvements. The ASU addresses thirty-three items, representing the changes to the Codification that (1) clarify, (2) correct errors, or (3) make minor improvements. Generally, the amendments in this ASU are not intended to result in significant changes for most entities. The ASU is effective for interim reporting periods within annual reporting periods beginning in January 2027, with early adoption permitted. The adoption method of this ASU may vary, on an issue-by-issue basis. The Company is currently evaluating the impact of the ASU, but does not anticipate the adoption of this standard to have a material impact on our financial statements.
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