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Other Long-Term Liabilities | 6 Months Ended
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Jun. 30, 2025
Other Long-Term Liabilities |
Other Long-Term Liabilities | (8) Other Long-Term Liabilities Other long-term liabilities include the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | June 30, |  | December 31,
​ | ​ | 2025 | ​ | 2024
​ | ​ | (In thousands)
Net deferred tax liabilities related to IPR&D (Note 13) | ​ | $ | 1,613 | ​ | $ | 1,613
Deferred income from sale of tax benefits | ​ |  | 1,860 | ​ | ​ | 2,790
Deferred revenue (Note 12) | ​ |  | — | ​ | ​ | 12
Total | ​ |  | 3,473 | ​ | ​ | 4,415
Less current portion | ​ |  | (930) | ​ | ​ | (942)
Long-term portion | ​ | $ | 2,543 | ​ | $ | 3,473
​ In March 2022, the Company received approval from the New Jersey Economic Development Authority and agreed to sell New Jersey tax benefits of $5.0 million to an independent third party for $4.7 million. Under the agreement, the Company must maintain a base of operations in New Jersey for five years or the tax benefits must be paid back on a pro-rata basis based on the number of years completed. The Company recognized $0.9 million and $0.9 million in other income related to the sale of these tax benefits for the six months ended June 30, 2025 and June 30, 2024, respectively.

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