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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