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Note 9 - Share-based Compensation - Share-based Compensation Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Share-based compensation expense | $ 873 | $ 541 | $ 2,306 | $ 1,216
Cost of Sales [Member] |  |  |  |
Share-based compensation expense | 255 | 125 | 576 | 249
Selling, General and Administrative Expenses [Member] |  |  |  |
Share-based compensation expense | $ 618 | $ 416 | $ 1,730 | $ 967

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- Details
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