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Note 3 - Supplemental Balance Sheet Information - Composition of Intangible Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Cost | $ 28,247 | $ 28,060
Accumulated amortization | 13,140 | 12,139
Net | 15,107 | 15,921
Customer Relationships [Member] |  |
Cost | 13,092 | 12,970
Accumulated amortization | 6,656 | 5,992
Net | 6,436 | 6,978
Patented Technology [Member] |  |
Cost | 5,606 | 5,557
Accumulated amortization | 5,322 | 5,171
Net | 284 | 386
Trade Names [Member] |  |
Cost | 4,647 | 4,629
Accumulated amortization | 647 | 522
Net | 4,000 | 4,107
Trademarks [Member] |  |
Cost | 3,402 | 3,404
Accumulated amortization | 0 | 0
Net | 3,402 | 3,404
Other Intangible Assets [Member] |  |
Cost | 1,500 | 1,500
Accumulated amortization | 515 | 454
Net | $ 985 | $ 1,046

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