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Note 7 - Acquired Intangible Assets, Net - Summary of Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Gross value | $ 118,859 | $ 28,206 |
Accumulated Currency Translation Adjustment | (4,227) | (4,759) |
Current period impairment charge | (2,439) | (389) | $ 0
Accumulated Amortization | (21,036) | (15,473) |
Net book value | $ 91,157 | $ 7,585 |
Useful life (Year) | 13 years | 11 years |
Developed Technology Rights [Member] |  |  |
Gross value | $ 93,953 | $ 17,100 |
Accumulated Currency Translation Adjustment | (2,648) | (2,934) |
Current period impairment charge | (1,025) | (389) |
Accumulated Amortization | (14,381) | (9,657) |
Net book value | $ 75,899 | $ 4,120 |
Useful life (Year) | 15 years | 15 years |
In Process Research and Development [Member] |  |  |
Gross value | $ 5,006 | $ 4,406 |
Accumulated Currency Translation Adjustment | (1,005) | (1,234) |
Current period impairment charge | (1,414) | 0 |
Accumulated Amortization | 0 | 0 |
Net book value | 2,587 | 3,172 |
Customer Relationships [Member] |  |  |
Gross value | 9,000 |  |
Accumulated Currency Translation Adjustment | 0 |  |
Current period impairment charge | 0 |  |
Accumulated Amortization | (827) |  |
Net book value | $ 8,173 |  |
Useful life (Year) | 10 years |  |
Distribution Rights [Member] |  |  |
Gross value | $ 4,700 | 4,700 |
Accumulated Currency Translation Adjustment | (415) | (415) |
Current period impairment charge | 0 | 0 |
Accumulated Amortization | (4,285) | (4,285) |
Net book value | $ 0 | $ 0 |
Useful life (Year) | 5 years | 5 years |
Patents [Member] |  |  |
Gross value | $ 1,000 | $ 1,000 |
Accumulated Currency Translation Adjustment | (159) | (176) |
Current period impairment charge | 0 | 0 |
Accumulated Amortization | (582) | (531) |
Net book value | $ 259 | $ 293 |
Useful life (Year) | 16 years | 16 years |
Trade Names [Member] |  |  |
Gross value | $ 5,200 | $ 1,000 |
Accumulated Currency Translation Adjustment | 0 | 0 |
Current period impairment charge | 0 | 0 |
Accumulated Amortization | (961) | (1,000) |
Net book value | $ 4,239 | $ 0 |
Useful life (Year) | 5 years | 9 years |

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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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 The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 + Details
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