| Schedule of finite lived intangible assets |
| | | | | | | | | | | | | | Weighted- | | At June 30, 2024 | | | Average | | Gross | | | | | | | Amortization | | Carrying | | Accumulated | | Net | (In thousands) | | Period | | Amount | | Amortization | | Amount | Definite-lived intangible assets: | | | | | | | | | | | | Patents | | 12 years | | $ | 1,060 | | $ | 290 | | $ | 770 | Defensive intangible assets | | 1 year | | | 1,125 | | | 993 | | | 132 | Customer accounts | | — | | | 125 | | | 125 | | | — | Customer relationships | | 10 years | | | 31,000 | | | 6,704 | | | 24,296 | Developed technology | | 8 years | | | 13,000 | | | 3,322 | | | 9,678 | Subtotal | | | | | 46,310 | | | 11,434 | | | 34,876 | Unamortized intangible assets: | | | | | | | | | | | | Tradenames | | | | | 9,500 | | | — | | | 9,500 | Patents pending | | | | | 507 | | | — | | | 507 | Total intangible assets | | | | $ | 56,317 | | $ | 11,434 | | $ | 44,883 |
| | | | | | | | | | | | | | Weighted- | | At December 31, 2023 | | | Average | | Gross | | | | | | | Amortization | | Carrying | | Accumulated | | Net | (In thousands) | | Period | | Amount | | Amortization | | Amount | Definite-lived intangible assets: | | | | | | | | | | | | Patents | | 12 years | | $ | 1,018 | | $ | 248 | | $ | 770 | Defensive intangible assets | | 1 year | | | 1,125 | | | 920 | | | 205 | Customer accounts | | — | | | 125 | | | 125 | | | — | Customer relationships | | 11 years | | | 31,000 | | | 5,511 | | | 25,489 | Developed technology | | 9 years | | | 13,000 | | | 2,731 | | | 10,269 | Subtotal | | | | | 46,268 | | | 9,535 | | | 36,733 | Unamortized intangible assets: | | | | | | | | | | | | Tradenames | | | | | 9,500 | | | — | | | 9,500 | Patents pending | | | | | 491 | | | — | | | 491 | Total intangible assets | | | | $ | 56,259 | | $ | 9,535 | | $ | 46,724 |
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