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Note 3 - Supplemental Balance Sheet Information - Intangible Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Intangible assets | $ 4,781 | $ 5,833
Less accumulated amortization | (3,601) | (3,793)
Intangible assets, net | 1,180 | 2,040
Customer Contracts And Lists [Member] |  |
Intangible assets | 3,011 | 3,543
Trade Names [Member] |  |
Intangible assets | 900 | 900
Patents [Member] |  |
Intangible assets | 870 | 870
Noncompete Agreements [Member] |  |
Intangible assets | $ 0 | $ 520

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