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Note 5 - Supplemental Balance Sheet Information - Composition of Intangible Assets (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Cost | $ 28,076 | $ 28,454
Accumulated Amortization | 11,510 | 11,064
Net | 16,566 | 17,390
Customer Relationships [Member] |  |
Cost | 12,978 | 13,214
Accumulated Amortization | 5,689 | 5,484
Net | 7,289 | 7,730
Patented Technology [Member] |  |
Cost | 5,560 | 5,667
Accumulated Amortization | 5,117 | 5,126
Net | 443 | 541
Trade Names [Member] |  |
Cost | 4,631 | 4,670
Accumulated Amortization | 468 | 436
Net | 4,163 | 4,234
Trademarks [Member] |  |
Cost | 3,407 | 3,413
Accumulated Amortization | 0 | 0
Net | 3,407 | 3,413
Other Intangible Assets [Member] |  |
Cost | 1,500 | 1,490
Accumulated Amortization | 236 | 18
Net | $ 1,264 | $ 1,472

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