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Note 9 - Prepaid Forward Obligation | 3 Months Ended
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Mar. 31, 2026
Notes to Financial Statements |
Prepaid Forward Obligation Disclosure [Text Block] | Note 9 – Prepaid Forward Obligation In March 2021, the Company entered into a prepaid forward agreement with RTW Investments (“RTW”). Under the terms of the RTW Transaction, the Company received $75.0 million ($72.4 million net of transaction costs) to support the launch of Jelmyto and the development of Zusduri. In return for the transferred funds, RTW is entitled to receive tiered, future cash payments based on aggregate worldwide annual net product sales of Jelmyto and, subject to FDA approval, UGN-104, in an amount equal to: (i) 9.5% of annual net sales up to $200 million, (ii) 3.0% of annual net sales for annual net sales between $200 million and $300 million, and (iii) 1.0% of annual net sales for annual net sales above $300 million. If certain revenue thresholds for Jelmyto aggregate worldwide annual net sales are not met, the future cash payments to RTW with respect to Jelmyto annual net sales up to $200 million will increase by 3.5%, and may decrease back to 9.5% dependent on the Company meeting certain subsequent Jelmyto aggregate worldwide annual net sales thresholds. The rate in effect for the three months ended March 31, 2026 for annual net sales up to $200 million was 13.0%. RTW is entitled to receive tiered, future cash payments based on aggregate worldwide annual net product sales of Zusduri and, subject to FDA approval, UGN-103, in an amount equal to: (i) 2.5% of annual net sales up to $200 million, (ii) 1.0% of annual net sales for annual net sales between $200 million and $300 million, and (iii) 0.5% of annual net sales for annual net sales above $300 million. In accordance with the prepaid forward agreement, the Company will be required to make payments of amounts owed to RTW each calendar quarter, through and until the quarter in which the aggregate cash payments received by RTW are equal to or greater than $300 million. As of March 31, 2026, the cumulative amounts paid and payable by the Company were $51.0 million. As security for the payment and fulfilment of these amounts throughout the arrangement, the Company has granted RTW a first priority security interest in Jelmyto, Zusduri, UGN-103 and UGN-104, including the regulatory approvals, intellectual property, material agreements, proceeds and accounts receivable related to these products. In May 2021, following the receipt of necessary regulatory approvals, the Company received the $75.0 million prepaid forward payment ($72.4 million net of transaction costs) from RTW and recognized an associated prepaid forward obligation liability. Each period the Company makes a payment to RTW, an expense is recognized related to financing on the prepaid forward obligation based on an imputed rate derived from the expected future payments. Management reassesses the effective rate each period based on the current carrying value of the obligation and the revised estimated future payments. Changes in future payments from previous estimates are included in future financing expenses. The Company is not contractually obligated, nor does it anticipate making any repayments to RTW of the original $75.0 million received in the RTW Transaction in the next 12 months. The following table shows the activity with respect to the carrying value of the prepaid forward liability for the year ended December 31, 2025 and for the three months ended March 31, 2026, in thousands:
Carrying value of prepaid forward obligation as of December 31, 2024 |  | $ | 121,387 |
Financing on prepaid forward obligation |  |  | 18,503 |
Amounts paid and payable (1) |  |  | (12,614 | )
Carrying value of prepaid forward obligation as of December 31, 2025 |  |  | 127,276 |
Financing on prepaid forward obligation |  |  | 4,506 |
Amounts paid and payable (1) |  |  | (3,554 | )
Carrying value of prepaid forward obligation as of March 31, 2026 |  | $ | 128,228 |
(1) $3.6 million and $3.4 million of the Amounts paid and payable are included as the current portion of the prepaid forward obligation within other current liabilities on the condensed consolidated balance sheets as of March 31, 2026, and December 31, 2025, respectively.

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