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License and Acquired Intangibles, Net | 3 Months Ended
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Mar. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
License and Acquired Intangibles, Net | 9. License and Acquired Intangibles, Net. The following table presents the Company’s intangible assets at March 31, 2025 (in thousands):
|  | Gross Carrying Value |  |  | Accumulated Amortization |  |  | Net Carrying Value |
Intangible assets: |  |  |  |  |  |  |  |  |
License and acquired intangibles for RUZURGI® |  | $ | 33,569 |  |  | $ | 6,319 |  |  | $ | 27,250 |
License and acquired intangibles for FYCOMPA® |  |  | 158,143 |  |  |  | 69,209 |  |  |  | 88,934 |
License and acquired intangibles for AGAMREE® |  |  | 36,000 |  |  |  | 4,857 |  |  |  | 31,143 |
Total |  | $ | 227,712 |  |  | $ | 80,385 |  |  | $ | 147,327 |
The following table presents the Company’s intangible assets at December 31, 2024 (in thousands):
|  | Gross Carrying Value |  |  | Accumulated Amortization |  |  | Net Carrying Value |
Intangible assets: |  |  |  |  |  |  |  |  |
License and acquired intangibles for RUZURGI® |  | $ | 33,569 |  |  | $ | 5,739 |  |  | $ | 27,830 |
License and acquired intangibles for FYCOMPA® |  |  | 158,143 |  |  |  | 61,301 |  |  |  | 96,842 |
License and acquired intangibles for AGAMREE® |  |  | 36,000 |  |  |  | 4,000 |  |  |  | 32,000 |
Total |  | $ | 227,712 |  |  | $ | 71,040 |  |  | $ | 156,672 |
The Company amortizes its definite-lived intangible assets using the straight-line method, which is considered the best estimate of economic benefit, over its estimated useful life. The estimated useful life used for this purpose for RUZURGI®, FYCOMPA® and AGAMREE® was approximately 14.5 years, 5 years and 10.5 years, respectively. The Company recorded approximately $0.6 million in amortization expense related to the licensed and acquired intangibles for RUZURGI® during each of the three months ended March 31, 2025 and 2024, within selling, general and administrative expenses in the consolidated statements of operations and comprehensive income. The Company recorded approximately $7.9 million in amortization expense related to the licensed and acquired intangibles for FYCOMPA® during each of the three months ended March 31, 2025 and 2024, within cost of sales in the consolidated statement of operations and comprehensive income. The Company recorded approximately $0.9 million in amortization expense related to the licensed and acquired intangibles for AGAMREE® during each of the three months ended March 31, 2025 and 2024, within cost of sales in the consolidated statement of operations and comprehensive income. Amortization of the FYCOMPA®, RUZURGI® and AGAMREE® intangible assets are reported together as amortization of intangible assets in the consolidated statements of operations and comprehensive income. The following table presents future amortization expense the Company expects for its intangible assets (in thousands):
2025 (remaining nine months) |  | $ | 28,033 |
2026 |  |  | 37,378 |
2027 |  |  | 37,378 |
2028 |  |  | 7,705 |
2029 |  |  | 5,750 |
Thereafter |  |  | 31,083 |
Total |  | $ | 147,327 |
At March 31, 2025 and December 31, 2024, the weighted average amortization period remaining for intangible assets was 5.2 years and 5.4 years, respectively. There were no impairment charges recognized on definite-lived intangibles for the three months ended March 31, 2025 or 2024.

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