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Note 10 - Goodwill and Other Intangible Assets - Major Components of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Intangible assets, cost | $ 16,944 | $ 16,873 |
Intangible assets, accumulated amortization | 12,527 | 11,164 |
Goodwill, Ending Balance | 27,537 | 27,215 | $ 27,234
Intangible assets, including goodwill, cost | 46,702 | 46,160 |
Trademarks and Trade Names [Member] |  |  |
Trade names and trademarks | 2,221 | 2,072 |
Customer Relationships [Member] |  |  |
Intangible assets, cost | 7,876 | 7,832 |
Intangible assets, accumulated amortization | 6,991 | 6,301 |
Technology and Drawings [Member] |  |  |
Intangible assets, cost | 6,761 | 6,749 |
Intangible assets, accumulated amortization | 4,015 | 3,712 |
Other Intangible Assets [Member] |  |  |
Intangible assets, cost | 2,307 | 2,292 |
Intangible assets, accumulated amortization | $ 1,521 | $ 1,151 |

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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