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Note 8 - Goodwill and Other Intangible Assets - Major Components of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Intangible assets, cost | $ 16,590 | $ 20,349 |
Intangible assets, accumulated amortization | 8,933 | 8,396 |
Goodwill | 27,551 | 28,030 | $ 24,559
Intangible assets, including goodwill, cost | 46,851 | 51,267 |
Trademarks and Trade Names [Member] |  |  |
Trade names and trademarks | 2,710 | 2,888 |
Customer Relationships [Member] |  |  |
Intangible assets, cost | 7,966 | 11,885 |
Intangible assets, accumulated amortization | 4,791 | 4,650 |
Technology and Drawings [Member] |  |  |
Intangible assets, cost | 6,758 | 6,741 |
Intangible assets, accumulated amortization | 3,121 | 2,804 |
Other Intangible Assets [Member] |  |  |
Intangible assets, cost | 1,866 | 1,723 |
Intangible assets, accumulated amortization | $ 1,021 | $ 942 |

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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/presentationRef -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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 + Details
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- Definition Carrying amount (original costs adjusted for previously recognized amortization and impairment) as of the balance sheet date for the rights acquired through registration of a trade name to gain or protect exclusive use thereof for a projected indefinite period of benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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