Helio Vision Acquisition	9 Months Ended
Sep. 30, 2024
Business Combinations [Abstract]
Helio Vision Acquisition	3. Helio Vision Acquisition On January 28, 2019 (Closing Date), the Company acquired Helio Vision, Inc. (Helio) and thereby obtained rights to develop ADX-2191 for the treatment of proliferative vitreoretinopathy (the Helio Product Candidate) pursuant to an Agreement and Plan of Merger dated as of January 24, 2019 (the Merger Agreement). As a result of the acquisition, the Company issued an aggregate of 1,407,006 shares of common stock to the former securityholders and an advisor of Helio, including 246,562 shares issued in January 2021, pursuant to the terms of the acquisition agreement. In addition, the Company, subject to the conditions of the acquisition agreement, was contingently obligated to make additional payments to the former securityholders of Helio as follows: (a) $10.0 million of common stock following approval by the FDA of a new drug application (NDA) for the prevention and/or treatment of proliferative vitreoretinopathy or a substantially similar label prior to the 10th anniversary of the Closing Date; and (b) $2.5 million of common stock following FDA approval of an NDA for an indication (other than proliferative vitreoretinopathy or a substantially similar label) prior to the 12th anniversary of the Closing Date (the shares of common stock issuable pursuant to the preceding clauses (a) and (b) are referred to herein as the Milestone Shares), provided that in no event shall the Company be obligated to issue more than an aggregate of 5,248,885 shares of common stock in connection with the Helio acquisition. During the nine months ended September 30, 2024, the Company ceased development of the Helio Product Candidate for the treatment of proliferative vitreoretinopathy. As a result, subject to the terms and conditions of the Merger Agreement, the Helio Product Candidate and related intellectual property rights may revert back to an entity designated by the representative of the former Helio stockholders. Additionally, in the event of certain change of control or divestitures by the Company, certain former convertible noteholders of Helio will be entitled to a tax gross-up payment in an amount not to exceed $1.0 million in the aggregate. The Company determined that liability accounting is not required for the Milestone Shares under FASB ASC Topic 480, Distinguishing Liabilities from Equity (ASC 480). The Company also determined that the Milestone Shares meet the scope exception as a derivative under FASB ASC Topic 815, Derivatives and Hedging (ASC 815), from inception of the Milestone Shares through September 30, 2024. Accordingly, the Milestone Shares are evaluated under FASB ASC Topic 450, Contingencies (ASC 450) and the Company will record a liability related to the Milestone Shares if the milestones are achieved, and the obligation to issue the Milestone Shares becomes probable. At such time, the Company will record the cost of the Milestone Shares issued to the Helio founders as a compensation expense and to the other former securityholders of Helio as an in-process research and development expense if there is no alternative future use. No milestones related to the remaining Milestone Shares are considered probable of being achieved as of September 30, 2024.

Helio Vision Acquisition

9 Months Ended

Sep. 30, 2024

On January 28, 2019 (Closing Date), the Company acquired Helio Vision, Inc. (Helio) and thereby obtained rights to develop ADX-2191 for the treatment of proliferative vitreoretinopathy (the Helio Product Candidate) pursuant to an Agreement and Plan of Merger dated as of January 24, 2019 (the Merger Agreement). As a result of the acquisition, the Company issued an aggregate of 1,407,006 shares of common stock to the former securityholders and an advisor of Helio, including 246,562 shares issued in January 2021, pursuant to the terms of the acquisition agreement. In addition, the Company, subject to the conditions of the acquisition agreement, was contingently obligated to make additional payments to the former securityholders of Helio as follows: (a) $10.0 million of common stock following approval by the FDA of a new drug application (NDA) for the prevention and/or treatment of proliferative vitreoretinopathy or a substantially similar label prior to the 10th anniversary of the Closing Date; and (b) $2.5 million of common stock following FDA approval of an NDA for an indication (other than proliferative vitreoretinopathy or a substantially similar label) prior to the 12th anniversary of the Closing Date (the shares of common stock issuable pursuant to the preceding clauses (a) and (b) are referred to herein as the Milestone Shares), provided that in no event shall the Company be obligated to issue more than an aggregate of 5,248,885 shares of common stock in connection with the Helio acquisition. During the nine months ended September 30, 2024, the Company ceased development of the Helio Product Candidate for the treatment of proliferative vitreoretinopathy. As a result, subject to the terms and conditions of the Merger Agreement, the Helio Product Candidate and related intellectual property rights may revert back to an entity designated by the representative of the former Helio stockholders. Additionally, in the event of certain change of control or divestitures by the Company, certain former convertible noteholders of Helio will be entitled to a tax gross-up payment in an amount not to exceed $1.0 million in the aggregate.

The Company determined that liability accounting is not required for the Milestone Shares under FASB ASC Topic 480, Distinguishing Liabilities from Equity (ASC 480). The Company also determined that the Milestone Shares meet the scope exception as a derivative under FASB ASC Topic 815, Derivatives and Hedging (ASC 815), from inception of the Milestone Shares through September 30, 2024. Accordingly, the Milestone Shares are evaluated under FASB ASC Topic 450, Contingencies (ASC 450) and the Company will record a liability related to the Milestone Shares if the milestones are achieved, and the obligation to issue the Milestone Shares becomes probable. At such time, the Company will record the cost of the Milestone Shares issued to the Helio founders as a compensation expense and to the other former securityholders of Helio as an in-process research and development expense if there is no alternative future use. No milestones related to the remaining Milestone Shares are considered probable of being achieved as of September 30, 2024.