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v3.19.3.a.u2

Note 1 - Organization and Significant Accounting Policies - Equity-based Compensation Expenses Related to Stock Options, SARs, RSUs and Employee Stock Purchase Plan (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Total equity-based compensation expense | $ 10,718 | $ 10,367 | $ 8,693
Cost of Sales [Member] |  |  |
Total equity-based compensation expense | 630 | 588 | 459
Research and Development Expense [Member] |  |  |
Total equity-based compensation expense | 5,857 | 5,141 | 3,839
Sales and Marketing [Member] |  |  |
Total equity-based compensation expense | 1,495 | 1,587 | 1,428
General and Administrative Expense [Member] |  |  |
Total equity-based compensation expense | $ 2,736 | $ 3,051 | $ 2,967

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