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Note I - Intangible Assets, Net | 12 Months Ended
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Dec. 31, 2024
Notes to Financial Statements |
Intangible Assets Disclosure [Text Block] | NOTE I—INTANGIBLE ASSETS Intangible assets consisted of the following for the periods indicated (in thousands):
|  | December 31, 2024 |
|  | Gross |  |  | Accumulated |  |  | Intangible |
|  | Amount |  |  | amortization |  |  | assets, net |
Patents |  | $ | 9,873 |  |  | $ | (6,355 | ) |  | $ | 3,518 |
Trademarks |  |  | 218 |  |  |  | (56 | ) |  |  | 162 |
Total intangible assets |  | $ | 10,091 |  |  | $ | (6,411 | ) |  | $ | 3,680 |
|  | December 31, 2023 |
|  | Gross |  |  | Accumulated |  |  | Intangible |
|  | Amount |  |  | amortization |  |  | assets, net |
Patents |  | $ | 9,502 |  |  | $ | (5,981 | ) |  | $ | 3,521 |
Trademarks |  |  | 138 |  |  |  | (31 | ) |  |  | 107 |
Total intangible assets |  | $ | 9,640 |  |  | $ | (6,012 | ) |  | $ | 3,628 |
For the years ended December 31, 2024, 2023 and 2022, amortization expense for intangible assets, included in general and administrative expenses on the income statement, was $0.4 million, $0.7 million and $0.6 million, respectively. The remaining weighted average amortization period for intangible assets is approximately 9 years. At December 31, 2024, future amortization expense for intangible assets is estimated to be (in thousands):
|  | December 31, 2024 |
2025 |  | $ | 438 |
2026 |  |  | 438 |
2027 |  |  | 438 |
2028 |  |  | 438 |
2029 |  |  | 438 |
Thereafter |  |  | 1,490 |
Total |  | $ | 3,680 |

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