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Condensed Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Amortization of intangible assets from acquisitions | $ 1,149 | $ 1,206 | $ 3,708 | $ 4,175
Related party support services fee income net of related expenses | 2,240 |  | 5,164 |
Sales and Marketing |  |  |  |
Amortization of intangible assets from acquisitions | 539 | 437 | 1,711 | 1,616
Related party support services fee income net of related expenses | 281 |  | 447 |
General and Administrative |  |  |  |
Amortization of intangible assets from acquisitions |  | 141 | 112 | 547
Related party support services fee income net of related expenses | 584 |  | 1,065 |
Product development |  |  |  |
Related party support services fee income net of related expenses | 550 |  | 1,501 |
Service Costs |  |  |  |
Amortization of intangible assets from acquisitions | 610 | $ 628 | 1,885 | $ 2,012
Related party support services fee income net of related expenses | $ 825 |  | $ 2,151 |

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