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Note 7 - Acquired Intangible Assets, Net - Summary of Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Gross value | $ 112,736 | $ 118,859 |
Accumulated Currency Translation Adjustment | (3,218) | (4,227) |
Current period impairment charge | (600) | (2,439) | $ (389)
Accumulated Amortization | (26,536) | (21,036) |
Net book value | $ 82,382 | $ 91,157 |
Useful life (Year) | 13 years | 13 years |
Intangible assets, net | $ 82,382 | $ 91,157 |
Developed Technology Rights [Member] |  |  |
Gross value | 89,580 | 93,953 |
Accumulated Currency Translation Adjustment | (1,608) | (2,648) |
Current period impairment charge | 0 | (1,025) |
Accumulated Amortization | (17,891) | (14,381) |
Net book value | $ 70,081 | $ 75,899 |
Useful life (Year) | 15 years | 15 years |
Intangible assets, net | $ 70,081 | $ 75,899 |
In Process Research and Development [Member] |  |  |
Gross value | 3,256 | 5,006 |
Accumulated Currency Translation Adjustment | (1,006) | (1,005) |
Current period impairment charge | (600) | (1,414) |
Accumulated Amortization | 0 | 0 |
Net book value | 1,650 | 2,587 |
Intangible assets, net | 1,650 | 2,587 |
Customer Relationships [Member] |  |  |
Gross value | 9,000 | 9,000 |
Accumulated Currency Translation Adjustment | 0 | 0 |
Current period impairment charge | 0 | 0 |
Accumulated Amortization | (1,727) | (827) |
Net book value | $ 7,273 | $ 8,173 |
Useful life (Year) | 10 years | 10 years |
Intangible assets, net | $ 7,273 | $ 8,173 |
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 |
Intangible assets, net | $ 0 | $ 0 |
Patents [Member] |  |  |
Gross value | 1,000 | 1,000 |
Accumulated Currency Translation Adjustment | (189) | (159) |
Current period impairment charge | 0 | 0 |
Accumulated Amortization | (632) | (582) |
Net book value | $ 179 | $ 259 |
Useful life (Year) | 16 years | 16 years |
Intangible assets, net | $ 179 | $ 259 |
Trade Names [Member] |  |  |
Gross value | 5,200 | 5,200 |
Accumulated Currency Translation Adjustment | 0 | 0 |
Current period impairment charge | 0 | 0 |
Accumulated Amortization | (2,001) | (961) |
Net book value | $ 3,199 | $ 4,239 |
Useful life (Year) | 5 years | 5 years |
Intangible assets, net | $ 3,199 | $ 4,239 |

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