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v3.20.2

Condensed Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Restructuring | $ 1,430 | $ 0 | $ 2,022 | $ 398
Stock-based compensation | (1,850) | (1,498) |  |
Inventory step-up and backlog amortization |  |  | 0 | 12
Cost of revenue |  |  |  |
Restructuring | 166 | 0 | 166 | 0
Stock-based compensation | 117 | 89 | 345 | 267
Inventory step-up and backlog amortization | 0 | 0 | 0 | 12
Cost of revenue | Acquired intangible assets |  |  |  |
Amortization of acquired intangible assets | 298 | 298 | 894 | 894
Research and development |  |  |  |
Stock-based compensation | 820 | 570 | 2,274 | 1,934
Selling, general and administrative |  |  |  |
Amortization of acquired intangible assets | 76 | 76 | 228 | 236
Stock-based compensation | $ 913 | $ 839 | $ 3,296 | $ 2,651

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