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Note 4 - Supplemental Balance Sheet Information - Composition of Intangible Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Cost | $ 28,060 | $ 28,454
Accumulated amortization | 12,139 | 11,064
Net | 15,921 | 17,390
Customer Relationships [Member] |  |
Cost | 12,970 | 13,214
Accumulated amortization | 5,992 | 5,484
Net | 6,978 | 7,730
Patented Technology [Member] |  |
Cost | 5,557 | 5,667
Accumulated amortization | 5,171 | 5,126
Net | 386 | 541
Trade Names [Member] |  |
Cost | 4,629 | 4,670
Accumulated amortization | 522 | 436
Net | 4,107 | 4,234
Trademarks [Member] |  |
Cost | 3,404 | 3,413
Accumulated amortization | 0 | 0
Net | 3,404 | 3,413
Other Intangible Assets [Member] |  |
Cost | 1,500 | 1,490
Accumulated amortization | 454 | 18
Net | $ 1,046 | $ 1,472

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