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Note 4 - Supplemental Balance Sheet Information - Composition of Intangible Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Cost | $ 28,454 | $ 19,662
Accumulated Amortization | 11,064 | 10,453
Net | 17,390 | 9,209
Customer Relationships [Member] |  |
Cost | 13,214 | 9,171
Accumulated Amortization | 5,484 | 5,115
Net | 7,730 | 4,056
Patented Technology [Member] |  |
Cost | 5,667 | 5,557
Accumulated Amortization | 5,126 | 5,014
Net | 541 | 543
Trade Names [Member] |  |
Cost | 4,670 | 1,524
Accumulated Amortization | 436 | 324
Net | 4,234 | 1,200
Trademarks [Member] |  |
Cost | 3,413 | 3,410
Accumulated Amortization | 0 | 0
Net | 3,413 | $ 3,410
Other Intangible Assets [Member] |  |
Cost | 1,490 |
Accumulated Amortization | 18 |
Net | $ 1,472 |

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