Summary of Significant Accounting Policies (Policies)	6 Months Ended
Jun. 30, 2024
Accounting Policies [Abstract]
Revenue Recognition	Revenue Recognition Revenue is recognized when a customer obtains control of promised goods or services, in an amount that reflects the consideration which the entity expects to receive in exchange for those goods or services. To determine revenue recognition for arrangements that an entity determines are within the scope of ASC 606, Revenue from Contracts with Customers (ASC 606), the Company performs the following five steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) the entity satisfies a performance obligation. The Company only applies the five-step model to contracts when it is probable that the entity will collect the consideration it is entitled to in exchange for the goods or services it transfers to the customer. At contract inception, once the contract is determined to be within the scope of ASC 606, the Company assesses the goods or services promised within the contract, determines those that are performance obligations and assesses whether each promised good or service is distinct. The Company then recognizes as revenue the amount of the transaction price that is allocated to the respective performance obligation when (or as) the performance obligation is satisfied. Sales, value-add and other taxes collected on behalf of third parties are excluded from revenue. Product sales, net — Effective January 2023, commercial sales of DEXYCU® were no longer supported by the Company, remaining available only through specialty distributors. Effective May 2023, YUTIQ® has been and continues to be sold under commercial supply agreements with Alimera Sciences, Inc. (Alimera) and Ocumension Therapeutics (Ocumension) (see Note 3). Prior to the above dates, the Company sold YUTIQ® and DEXYCU® to a limited number of specialty distributors and specialty pharmacies (collectively the Distributors) in the U.S., with whom the Company had entered into formal agreements, for delivery to physician practices for YUTIQ® and to hospital outpatient departments and ambulatory surgical centers (ASCs) for DEXYCU®. The Company recognized revenue on sales of its products when Distributors obtained control of the products, which occurred at a point in time, typically upon delivery. In addition to agreements with Distributors, the Company also entered into arrangements with healthcare providers, ASCs, and payors that provided for government mandated and/or privately negotiated rebates, chargebacks, and discounts with respect to their purchase of the Company's products from Distributors. Reserves for variable consideration — Product sales were recorded at the wholesale acquisition costs, net of applicable reserves for variable consideration. Components of variable consideration included trade discounts and allowances, provider chargebacks and discounts, payor rebates, product returns, and other allowances that were offered within contracts between the Company and its Distributors, payors, and other contracted purchasers relating to the Company's product sales. These reserves were based on the amounts earned, or to be claimed on the related sales, and were classified either as reductions of product revenue and accounts receivable or a current liability, depending on how the amount was to be settled. Overall, these reserves reflected the Company's best estimates of the amount of consideration to which it was entitled based on the terms of the respective underlying contracts. The actual amounts of consideration ultimately received may differ from the Company's estimates. If actual results in the future vary from the estimates, the Company adjusts these estimates, which would affect product revenue and earnings in the period such variances become known. Distribution fees — The Company compensated its Distributors for services explicitly stated in the Company’s contracts and were recorded as a reduction of revenue in the period the related product sale was recognized. Provider chargebacks and discounts — Chargebacks were discounts that represented the estimated obligations resulting from contractual commitments to sell products at prices lower than the list prices charged to the Company’s Distributors. These Distributors charged the Company for the difference between what they paid for the product and the Company’s contracted selling price. These reserves were established in the same period that the related revenue was recognized, resulting in a reduction of product revenue and the establishment of a current liability. Reserves for chargebacks consisted of amounts that the Company expected to pay for units that remained in the distribution channel inventories at each reporting period-end that the Company expected to be sold under a contracted selling price, and chargebacks that Distributors had claimed, but for which the Company had not yet settled. Government rebates — The Company was subject to discount obligations under state Medicaid programs and Medicare. These reserves were recorded in the same period the related revenue was recognized, resulting in a reduction of product revenue and the establishment of a current liability which was included in accrued expenses and other current liabilities on the consolidated balance sheets. The Company’s liability for these rebates consisted of invoices received for claims from prior quarters that had not been paid or for which an invoice had not yet been received, estimates of claims for the current quarter, and estimated future claims that would be made for product that had been recognized as revenue, but which remained in the distribution channel inventories at the end of each reporting period. Payor rebates — The Company contracted with certain private payor organizations, primarily insurance companies, for the payment of rebates with respect to utilization of its products. The Company estimated these rebates and recorded such estimates in the same period the related revenue was recognized, resulting in a reduction of product revenue and the establishment of a current liability. Co-Payment assistance — The Company offered co-payment assistance to commercially insured patients meeting certain eligibility requirements. The calculation of the accrual for co-pay assistance was based on an estimate of claims and the cost per claim that the Company expected to receive associated with product that had been recognized as revenue. Product returns — The Company generally offered a limited right of return based on its returned goods policy, which included damaged product and remaining shelf life. The Company estimated the amount of its product sales that may be returned and recorded. License and collaboration agreement revenue — The Company analyzes each element of its license and collaboration arrangements to determine the appropriate revenue recognition. The terms of the license agreement may include payment to the Company of non-refundable upfront license fees, milestone payments if specified objectives are achieved, and/or royalties on product sales. The Company recognizes revenue from upfront payments at a point in time, typically upon fulfilling the delivery of the associated intellectual property to the customer. For licenses that are combined with other promises, the Company determines whether the combined performance obligation is satisfied over time or at a point in time, when (or as) the associated performance obligation in the contract is satisfied. If the contract contains a single performance obligation, the entire transaction price is allocated to the single performance obligation. Contracts that contain multiple performance obligations require an allocation of the transaction price based on the estimated relative standalone selling prices of the promised products or services underlying each performance obligation. The Company determines standalone selling prices based on the price at which the performance obligation is sold separately. If the standalone selling price is not observable through past transactions, the Company estimates the standalone selling price taking into account available information such as market conditions and internally approved pricing guidelines related to the performance obligations. The Company recognizes sales-based milestone payments as revenue upon the achievement of the cumulative sales amount specified in the contract in accordance with ASC 606-10-55-65. For those milestone payments which are contingent on the occurrence of particular future events, the Company determines that these need to be considered for inclusion in the calculation of total consideration from the contract as a component of variable consideration using the most-likely amount method. As such, the Company assesses each milestone to determine the probability and substance behind achieving each milestone. Given the inherent uncertainty associated with these future events, the Company will not recognize revenue from such milestones until there is a high probability of occurrence, which typically occurs near or upon achievement of the event. When determining the transaction price of a contract, an adjustment is made if payment from a customer occurs either significantly before or significantly after performance, resulting in a significant financing component. Applying the practical expedient in paragraph 606-10-32-18, the Company does not assess whether a significant financing component exists if the period between when the Company performs its obligations under the contract and when the customer pays is one year or less. None of the Company’s contracts contained a significant financing component as of June 30, 2024. Royalties — The Company recognizes revenue from license arrangements with its commercial partners’ net sales of products. Such revenues are included as royalty income. In accordance with ASC 606-10-55-65, royalties are recognized when the subsequent sale of the commercial partner’s products occurs. The Company’s commercial partners are obligated to report their net product sales and the resulting royalty due to the Company typically within 60-days from the end of each quarter. Based on historical product sales, royalty receipts and other relevant information, the Company recognizes royalty income each quarter and subsequently determines a true-up when it receives royalty reports and payment from its commercial partners. Historically, these true-up adjustments have been immaterial. Sale of Future Royalties — The Company has sold its rights to receive certain royalties on product sales. In the circumstance where the Company has sold its rights to future royalties under a royalty purchase agreement (RPA) and also maintains limited continuing involvement in the arrangement (but not significant continuing involvement in the generation of the cash flows that are due to the purchaser), the Company defers recognition of the proceeds it receives for the sale of royalty streams and recognizes such unearned revenue as revenue under the units-of-revenue method over the life of the underlying license agreement. Under the units-of-revenue method, amortization for a reporting period is calculated by computing a ratio of the proceeds received from the purchaser to the total payments expected to be made to the purchaser over the term of the agreement, and then applying that ratio to the period’s cash payment. Estimating the total payments expected to be received by the purchaser over the term of such arrangements requires management to use subjective estimates and assumptions. Changes to the Company’s estimate of the payments expected to be made to the purchaser over the term of such arrangements could have a material effect on the amount of revenues recognized in any particular period. Research Collaborations — The Company recognizes revenue over the term of the statements of work under any funded research collaborations. Revenue recognition for consideration, if any, related to a license option right is assessed based on the terms of any such future license agreement or is otherwise recognized at the completion of the research collaborations. Please refer to Note 3 for further details on the license and collaboration agreements into which the Company has entered and corresponding amounts of revenue recognized during the current and prior year periods. Cost of sales — Cost of sales consist of costs associated with the manufacture of YUTIQ® and DEXYCU®, certain period costs for DEXYCU® product revenue, product shipping, and as applicable, royalty expense. The inventory costs for YUTIQ® include purchases of various components, the active pharmaceutical ingredient (API), and direct labor and overhead for the product manufactured in the Company’s Watertown, Massachusetts facility. The inventory costs for DEXYCU® include purchased components, the API and third-party manufacturing, and assembly. For the three and six months ended June 30, 2024 and 2023, DEXYCU® product revenue-based royalty expense as a component of cost of sales was immaterial. Recently Adopted and Recently Issued Accounting Pronouncements In November 2023, the FASB issued ASU 2023-07—Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. This ASU was issued to improve reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. This ASU applies to all public entities that are required to report segment information in accordance with Topic 280, Segment Reporting. ASU 2023-07 is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted and the standard should be applied retrospectively. ASU 2023-07 will be effective for the Company for the annual period of its fiscal year ending December 31, 2024. The Company does not anticipate the adoption of this ASU will have a material impact on its consolidated financial statements. In December 2023, the FASB issued ASU 2023-09—Income Taxes (Topic 740): Improvements to Income Tax Disclosures. This ASU was issued to address investor requests for more transparency about income tax information through improvements to income tax disclosure primarily related to the rate reconciliation and income taxes paid information, and to improve the effectiveness of income tax disclosures. This ASU is effective for public entities for annual periods beginning after December 15, 2024. Early adoption is permitted. ASU 2023-09 will be effective for the Company in the first quarter of its fiscal year ending December 31, 2025. The Company is currently evaluating the impact the adoption of this ASU will have on its consolidated financial statements.
Recently Adopted and Recently Issued Accounting Pronouncements	Recently Adopted and Recently Issued Accounting Pronouncements In November 2023, the FASB issued ASU 2023-07—Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. This ASU was issued to improve reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. This ASU applies to all public entities that are required to report segment information in accordance with Topic 280, Segment Reporting. ASU 2023-07 is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted and the standard should be applied retrospectively. ASU 2023-07 will be effective for the Company for the annual period of its fiscal year ending December 31, 2024. The Company does not anticipate the adoption of this ASU will have a material impact on its consolidated financial statements. In December 2023, the FASB issued ASU 2023-09—Income Taxes (Topic 740): Improvements to Income Tax Disclosures. This ASU was issued to address investor requests for more transparency about income tax information through improvements to income tax disclosure primarily related to the rate reconciliation and income taxes paid information, and to improve the effectiveness of income tax disclosures. This ASU is effective for public entities for annual periods beginning after December 15, 2024. Early adoption is permitted. ASU 2023-09 will be effective for the Company in the first quarter of its fiscal year ending December 31, 2025. The Company is currently evaluating the impact the adoption of this ASU will have on its consolidated financial statements.

Revenue is recognized when a customer obtains control of promised goods or services, in an amount that reflects the consideration which the entity expects to receive in exchange for those goods or services. To determine revenue recognition for arrangements that an entity determines are within the scope of ASC 606, Revenue from Contracts with Customers (ASC 606), the Company performs the following five steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) the entity satisfies a performance obligation. The Company only applies the five-step model to contracts when it is probable that the entity will collect the consideration it is entitled to in exchange for the goods or services it transfers to the customer. At contract inception, once the contract is determined to be within the scope of ASC 606, the Company assesses the goods or services promised within the contract, determines those that are performance obligations and assesses whether each promised good or service is distinct. The Company then recognizes as revenue the amount of the transaction price that is allocated to the respective performance obligation when (or as) the performance obligation is satisfied. Sales, value-add and other taxes collected on behalf of third parties are excluded from revenue.

Product sales, net — Effective January 2023, commercial sales of DEXYCU® were no longer supported by the Company, remaining available only through specialty distributors. Effective May 2023, YUTIQ® has been and continues to be sold under commercial supply agreements with Alimera Sciences, Inc. (Alimera) and Ocumension Therapeutics (Ocumension) (see Note 3).

Prior to the above dates, the Company sold YUTIQ® and DEXYCU® to a limited number of specialty distributors and specialty pharmacies (collectively the Distributors) in the U.S., with whom the Company had entered into formal agreements, for delivery to physician practices for YUTIQ® and to hospital outpatient departments and ambulatory surgical centers (ASCs) for DEXYCU®. The Company recognized revenue on sales of its products when Distributors obtained control of the products, which occurred at a point in time, typically upon delivery. In addition to agreements with Distributors, the Company also entered into arrangements with healthcare providers, ASCs, and payors that provided for government mandated and/or privately negotiated rebates, chargebacks, and discounts with respect to their purchase of the Company's products from Distributors.

Reserves for variable consideration — Product sales were recorded at the wholesale acquisition costs, net of applicable reserves for variable consideration. Components of variable consideration included trade discounts and allowances, provider chargebacks and discounts, payor rebates, product returns, and other allowances that were offered within contracts between the Company and its Distributors, payors, and other contracted purchasers relating to the Company's product sales. These reserves were based on the amounts earned, or to be claimed on the related sales, and were classified either as reductions of product revenue and accounts receivable or a current liability, depending on how the amount was to be settled. Overall, these reserves reflected the Company's best estimates of the amount of consideration to which it was entitled based on the terms of the respective underlying contracts. The actual amounts of consideration ultimately received may differ from the Company's estimates. If actual results in the future vary from the estimates, the Company adjusts these estimates, which would affect product revenue and earnings in the period such variances become known.

Distribution fees — The Company compensated its Distributors for services explicitly stated in the Company’s contracts and were recorded as a reduction of revenue in the period the related product sale was recognized.

Provider chargebacks and discounts — Chargebacks were discounts that represented the estimated obligations resulting from contractual commitments to sell products at prices lower than the list prices charged to the Company’s Distributors. These Distributors charged the Company for the difference between what they paid for the product and the Company’s contracted selling price. These reserves were established in the same period that the related revenue was recognized, resulting in a reduction of product revenue and the establishment of a current liability. Reserves for chargebacks consisted of amounts that the Company expected to pay for units that remained in the distribution channel inventories at each reporting period-end that the Company expected to be sold under a contracted selling price, and chargebacks that Distributors had claimed, but for which the Company had not yet settled.

Government rebates — The Company was subject to discount obligations under state Medicaid programs and Medicare. These reserves were recorded in the same period the related revenue was recognized, resulting in a reduction of product revenue and the establishment of a current liability which was included in accrued expenses and other current liabilities on the consolidated balance sheets. The Company’s liability for these rebates consisted of invoices received for claims from prior quarters that had not been paid or for which an invoice had not yet been received, estimates of claims for the current quarter, and estimated future claims that would be made for product that had been recognized as revenue, but which remained in the distribution channel inventories at the end of each reporting period.

Payor rebates — The Company contracted with certain private payor organizations, primarily insurance companies, for the payment of rebates with respect to utilization of its products. The Company estimated these rebates and recorded such estimates in the

same period the related revenue was recognized, resulting in a reduction of product revenue and the establishment of a current liability.

Co-Payment assistance — The Company offered co-payment assistance to commercially insured patients meeting certain eligibility requirements. The calculation of the accrual for co-pay assistance was based on an estimate of claims and the cost per claim that the Company expected to receive associated with product that had been recognized as revenue.

Product returns — The Company generally offered a limited right of return based on its returned goods policy, which included damaged product and remaining shelf life. The Company estimated the amount of its product sales that may be returned and recorded.

License and collaboration agreement revenue — The Company analyzes each element of its license and collaboration arrangements to determine the appropriate revenue recognition. The terms of the license agreement may include payment to the Company of non-refundable upfront license fees, milestone payments if specified objectives are achieved, and/or royalties on product sales. The Company recognizes revenue from upfront payments at a point in time, typically upon fulfilling the delivery of the associated intellectual property to the customer. For licenses that are combined with other promises, the Company determines whether the combined performance obligation is satisfied over time or at a point in time, when (or as) the associated performance obligation in the contract is satisfied.

If the contract contains a single performance obligation, the entire transaction price is allocated to the single performance obligation. Contracts that contain multiple performance obligations require an allocation of the transaction price based on the estimated relative standalone selling prices of the promised products or services underlying each performance obligation. The Company determines standalone selling prices based on the price at which the performance obligation is sold separately. If the standalone selling price is not observable through past transactions, the Company estimates the standalone selling price taking into account available information such as market conditions and internally approved pricing guidelines related to the performance obligations.

The Company recognizes sales-based milestone payments as revenue upon the achievement of the cumulative sales amount specified in the contract in accordance with ASC 606-10-55-65. For those milestone payments which are contingent on the occurrence of particular future events, the Company determines that these need to be considered for inclusion in the calculation of total consideration from the contract as a component of variable consideration using the most-likely amount method. As such, the Company assesses each milestone to determine the probability and substance behind achieving each milestone. Given the inherent uncertainty associated with these future events, the Company will not recognize revenue from such milestones until there is a high probability of occurrence, which typically occurs near or upon achievement of the event.

When determining the transaction price of a contract, an adjustment is made if payment from a customer occurs either significantly before or significantly after performance, resulting in a significant financing component. Applying the practical expedient in paragraph 606-10-32-18, the Company does not assess whether a significant financing component exists if the period between when the Company performs its obligations under the contract and when the customer pays is one year or less. None of the Company’s contracts contained a significant financing component as of June 30, 2024.

Royalties — The Company recognizes revenue from license arrangements with its commercial partners’ net sales of products. Such revenues are included as royalty income. In accordance with ASC 606-10-55-65, royalties are recognized when the subsequent sale of the commercial partner’s products occurs. The Company’s commercial partners are obligated to report their net product sales and the resulting royalty due to the Company typically within 60-days from the end of each quarter. Based on historical product sales, royalty receipts and other relevant information, the Company recognizes royalty income each quarter and subsequently determines a true-up when it receives royalty reports and payment from its commercial partners. Historically, these true-up adjustments have been immaterial.

Sale of Future Royalties — The Company has sold its rights to receive certain royalties on product sales. In the circumstance where the Company has sold its rights to future royalties under a royalty purchase agreement (RPA) and also maintains limited continuing involvement in the arrangement (but not significant continuing involvement in the generation of the cash flows that are due to the purchaser), the Company defers recognition of the proceeds it receives for the sale of royalty streams and recognizes such unearned revenue as revenue under the units-of-revenue method over the life of the underlying license agreement. Under the units-of-revenue method, amortization for a reporting period is calculated by computing a ratio of the proceeds received from the purchaser to the total payments expected to be made to the purchaser over the term of the agreement, and then applying that ratio to the period’s cash payment.

Estimating the total payments expected to be received by the purchaser over the term of such arrangements requires management to use subjective estimates and assumptions. Changes to the Company’s estimate of the payments expected to be made to the purchaser over the term of such arrangements could have a material effect on the amount of revenues recognized in any particular period.

Research Collaborations — The Company recognizes revenue over the term of the statements of work under any funded research collaborations. Revenue recognition for consideration, if any, related to a license option right is assessed based on the terms of any such future license agreement or is otherwise recognized at the completion of the research collaborations.

Please refer to Note 3 for further details on the license and collaboration agreements into which the Company has entered and corresponding amounts of revenue recognized during the current and prior year periods.

Cost of sales — Cost of sales consist of costs associated with the manufacture of YUTIQ® and DEXYCU®, certain period costs for DEXYCU® product revenue, product shipping, and as applicable, royalty expense. The inventory costs for YUTIQ® include purchases of various components, the active pharmaceutical ingredient (API), and direct labor and overhead for the product manufactured in the Company’s Watertown, Massachusetts facility. The inventory costs for DEXYCU® include purchased components, the API and third-party manufacturing, and assembly.

For the three and six months ended June 30, 2024 and 2023, DEXYCU® product revenue-based royalty expense as a component of cost of sales was immaterial.

Recently Adopted and Recently Issued Accounting Pronouncements

In November 2023, the FASB issued ASU 2023-07—Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. This ASU was issued to improve reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. This ASU applies to all public entities that are required to report segment information in accordance with Topic 280, Segment Reporting. ASU 2023-07 is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted and the standard should be applied retrospectively. ASU 2023-07 will be effective for the Company for the annual period of its fiscal year ending December 31, 2024. The Company does not anticipate the adoption of this ASU will have a material impact on its consolidated financial statements.

In December 2023, the FASB issued ASU 2023-09—Income Taxes (Topic 740): Improvements to Income Tax Disclosures. This ASU was issued to address investor requests for more transparency about income tax information through improvements to income tax disclosure primarily related to the rate reconciliation and income taxes paid information, and to improve the effectiveness of income tax disclosures. This ASU is effective for public entities for annual periods beginning after December 15, 2024. Early adoption is permitted. ASU 2023-09 will be effective for the Company in the first quarter of its fiscal year ending December 31, 2025. The Company is currently evaluating the impact the adoption of this ASU will have on its consolidated financial statements.