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Note 8 - Share-based Compensation - Share-based Compensation Expenses (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Total share-based compensation expense | $ 1,170 | $ 2,790 | $ 4,848 | $ 8,019
Share-based compensation capitalized in intangible assets | 34 | 22 | 120 | 67
Total share-based compensation | 1,204 | 2,812 | 4,968 | 8,086
Selling and Marketing Expense [Member] |  |  |  |
Total share-based compensation expense | 172 | 292 | 659 | 821
Research and Development Expense [Member] |  |  |  |
Total share-based compensation expense | 291 | 278 | 814 | 800
General and Administrative Expense [Member] |  |  |  |
Total share-based compensation expense | $ 707 | $ 2,220 | $ 3,375 | $ 6,398

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