| Intangible Assets, Net Intangible assets, net consist of the following as of the periods presented: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | March 31, 2026 | | December 31, 2025 | | (in thousands) | Gross Carrying Amount | | Accumulated Amortization | | Net Carrying Amount | | Gross Carrying Amount | | Accumulated Amortization | | Net Carrying Amount | | Amortizable intangible assets: | | | | | | | | | | | | | Patents | $ | 8,069 | | | $ | (1,519) | | | $ | 6,550 | | | $ | 7,498 | | | $ | (1,418) | | | $ | 6,080 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Unamortized intangible assets: | | | | | | | | | | | | | Trademarks | 720 | | | — | | | 720 | | | 670 | | | — | | | 670 | | | Total intangible assets | $ | 8,789 | | | $ | (1,519) | | | $ | 7,270 | | | $ | 8,168 | | | $ | (1,418) | | | $ | 6,750 | |
Amortization expense is as follows for the periods presented: | | | | | | | | | | | | | | | | | | | Three Months Ended March 31, | | (in thousands) | | | | | 2026 | | 2025 | | Amortization expense | | | | | $ | 101 | | | $ | 67 | |
As of March 31, 2026, future amortization of patents is as follows: | | | | | | | (in thousands) | | | 2026 (excluding the three months ended March 31, 2026) | $ | 319 | | | 2027 | 426 | | | 2028 | 426 | | | 2029 | 426 | | | 2030 | 426 | | | Thereafter | 4,527 | | | Total | $ | 6,550 | |
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