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LONG-TERM DEBT (Tables) | 9 Months Ended
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Sep. 30, 2025
LONG-TERM DEBT |
Schedule of discounts recorded related to debt on closing date | ​
​ | ​ | ​ | ​
​ | ​ | (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
Schedule of Long-term debt | 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
Schedule of Principal payments of long-term debt | 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

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