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Note 3 - Supplemental Balance Sheet Information (Detail) - Composition of intangible assets (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Total intangible assets | $ 12,654 | $ 12,822
Total intangible assets | 7,615 | 7,289
Total intangible assets | 5,039 | 5,533
Trademarks [Member] |  |
Trademarks | 3,564 | 3,563
Patented Technology [Member] |  |
Finite Lived Intangible Assets, Gross | 4,495 | 4,492
Finite Lived Intangible Assets, Accumulated Amortization | 3,702 | 3,440
Finite Lived Intangible Assets, Net | 793 | 1,052
Customer Relationships [Member] |  |
Finite Lived Intangible Assets, Gross | 3,998 | 3,993
Finite Lived Intangible Assets, Accumulated Amortization | 3,366 | 3,143
Finite Lived Intangible Assets, Net | 632 | 850
Distributor Relationships [Member] |  |
Finite Lived Intangible Assets, Gross | 380 | 378
Finite Lived Intangible Assets, Accumulated Amortization | 330 | 310
Finite Lived Intangible Assets, Net | 50 | 68
Noncompete Agreements [Member] |  |
Finite Lived Intangible Assets, Gross | 217 | 396
Finite Lived Intangible Assets, Accumulated Amortization | $ 217 | $ 396

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