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LONG-TERM DEBT | 9 Months Ended
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Sep. 30, 2025
LONG-TERM DEBT |
LONG-TERM DEBT |
| 6. | LONG-TERM DEBT
Avenue Capital Group On June 28, 2024 (the “Closing Date”), the Company entered into a Loan and Security Agreement with the Avenue Capital Group (“Loan”). Avenue Capital Group agreed to loan the Company up to an aggregate of $20 million (the “Avenue Capital Commitment”), to be disbursed in two tranches. The first tranche of $15 million (“Tranche 1”), consists of $10 million which was available to the Company on the Closing Date and $5 million constitutes restricted cash, which was released from its restriction on January 10, 2025, as the following conditions were achieved: (i) the FDA has accepted Company’s application for review with respect to DrugSorb-ATR De Novo 510(k) and (ii) the Company has received a minimum of $3 million in net proceeds from the sale of its equity securities after the Closing Date. The restriction was released on a dollar-for-dollar basis for equity raised between $3 million and $5 million. The second tranche (“Tranche 2”) consists of $5 million, which may be disbursed at the Company’s request between July 1, 2025 and December 31, 2025, provided that the Company receives FDA marketing approval of its DrugSorb-ATR application. The proceeds from the Avenue Capital Commitment were used to pay off the existing outstanding debt with Bridge Bank and will additionally be used for working capital purposes and to fund general business requirements. Amounts borrowed under the Avenue Capital Commitment shall bear interest at a variable rate per annum equal to the greater of (A) the Prime Rate plus five percent (5.00%) or (B) thirteen and one-half percent (13.50%). On October 22, 2024, the Company announced that the FDA had accepted its application of DrugSorb-ATR, which was one of the two conditions required by the restricted cash debt covenant. Proceeds from the Rights Offering on January 10, 2025 satisfied the second condition of the debt covenant which now allows for the $5 million of restricted cash on the Company’s consolidated balance sheets to become unrestricted, and available for use. The loan requires interest-only payments for the first 24 months through July 1, 2026, followed by equal monthly installments of principal plus accrued and unpaid interest until maturity, on July 1, 2027; provided, however that if the Company draws the full amount of Tranche 2 by December 31, 2025, and achieves for the trailing six month period ended June 30, 2026, at least $25 million of revenue, (the Interest only Milestone as defined in the Loan), the Interest only Period will be extended by six months to January 1, 2027, followed by equal monthly installments of principal plus accrued and unpaid interest through January 1, 2028. On November 13, 2025, the interest only period was extended from July 1, 2026 to December 31, 2026, and the terms surrounding the access to Tranche 2 were amended. Refer to Note 10, Subsequent Events, for additional information. As of the Closing Date, the Company recorded the following discounts: ​
​ | ​ | ​ | ​
​ | ​ | (amounts, in thousands)
Fair value of warrants issued to Avenue Capital Group |  | $ | 690
Final fee | ​ | ​ | 900
Debt issuance cost | ​ |  | 498
Commitment fee paid on the Closing Date (1% of the Avenue Capital Group commitment) | ​ |  | 200
Total discounts recorded at inception against Avenue Capital Group Long-Term Debt | ​ | $ | 2,288
​ The Company amortizes debt discounts as interest expense using the interest method through the maturity date. The loan and security agreement included a final payment upon maturity of $0.9 million. The Company accretes the final payment as interest expense using the interest method through the maturity date. Upon a prepayment, the Company would incur a fee ranging from 1% to 3% of the outstanding principal, depending on the time of payment in relation to the maturity date. The Loan and Security Agreement includes customary loan conditions, company representations and warranties, company affirmative covenants and company negative covenants for secured transactions of this type. As of September 30, 2025, the Company was in compliance with these covenants. As additional consideration for the Commitment, on June 28, 2024, the Company also issued Avenue Capital Group with warrants with a fair value of $0.7 million to purchase an aggregate of 1,645,569 shares of the Company’s common stock for cash at the exercise price of $0.79, which expire on June 30, 2029. The number of warrants is fixed; however, the exercise price may be adjusted down if the Company raises equity (excluding sales of equity utilizing the Company’s at-the-market equity facility) at a share price that is lower than $0.79. These warrants meet the criteria for equity classification under Accounting Standards Codification 815. The Lenders were also granted the right while the Commitment is outstanding to convert up to an aggregate amount of $2 million of the principal amount of the outstanding Growth Capital Loans into the Company’s common stock at a fixed conversion price of 120% of the Closing Price (as defined in the warrant) or $0.95 per share (the “Conversion Option”). The Company’s obligations under the Loan and Security Agreement are joint and several. The obligations under the Loan and Security Agreement are secured by a first priority security interest in favor of the Lenders with respect to the Company’s Shares (as defined in the Loan and Security Agreement) and the Company’s Collateral (as defined in the Loan and Security Agreement), which includes the Company’s intellectual property, pursuant to that certain Intellectual Property Security Agreement, dated as of June 28, 2024, by and between the Company and the Administrative and Collateral Agent. ​ As of September 30, 2025, long-term debt, after giving consideration to the extension of the interest only period provided by the Amended Loan and Security Agreement from July 1, 2026 to December 31, 2026 (see Note 10, “Subsequent Events”), consists of the following:
​ | ​ | ​ | ​
​ | ​ | (amounts, in thousands)
Principal amount |  | $ | 15,000
Plus: final payment upon maturity | ​ | ​ | 900
Less unamortized debt discount | ​ | ​ | (1,333)
Long-term debt | ​ |  | 14,567
​ As of September 30, 2025, after giving consideration to the extension of the interest only period provided by the Amended Loan and Security Agreement from July 1, 2026 to December 31, 2026, (see Note 10, “Subsequent Events”) principal payments of long-term debt are due as follows:
​ | ​ | ​ | ​
​ | ​ | (amounts, in thousands)
2026 |  | $ | —
2027 | ​ |  | 15,900
Total | ​ | $ | 15,900
​ Bridge Bank On June 28, 2024, concurrent with the closing of the Avenue Capital Group financing discussed above, the Company paid off its previously outstanding debt with Bridge Bank, a division of Western Alliance Bank (the “Bank”). As of September 30, 2025, the following commitments survive after the termination of the Bridge Bank Amended and Restated Loan and Security Agreement and related amendments: 2022 Success Fee Letter Pursuant to the 2022 Success Fee Letter, the Company will pay to the Bank a success fee equal to (i) 1% of $5 million if the Company draws down the first tranche of the Company’s previously outstanding term loan with the Bank(the “Term C Loan”) and is payable only if the Company’s stock price equals or exceeds $8 for five consecutive trading days; (ii) 1.5% of $5 million if the Company draws down the second tranche of the Term C Loan and is payable only if the Company’s stock price equals or exceeds $10 for five consecutive trading days; and (iii) 2% of $5.0 million if the Company draws down the third tranche of the Term C Loan and is payable only if the Company’s stock price equals or exceeds $12 for five consecutive trading days (together, the “Success Fee”). the Company may pay the Success Fee in cash or in shares of common stock, at the Company’s sole discretion. The right of the Bank to receive the Success Fees and the obligation of the Company to pay the Success Fees hereunder shall terminate on the date that is fifth anniversary of the funding date of the last Term C Loans made but shall survive the termination of the Loan Agreement and any prepayment of the Term C Loans. The termination date of the 2022 Success Fee Letter is December 27, 2027.

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