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Balance Sheet Components (Acquired Intangible Assets, Net) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items] |  |
Acquired intangible assets, gross | $ 6,730 | $ 6,730
Less: accumulated amortization | (5,523) | (4,026)
Acquired intangible assets, net | 1,207 | 2,704
Amortization of acquired intangible assets | 1,496 |
Cost of revenue |  |
Finite-Lived Intangible Assets [Line Items] |  |
Amortization of acquired intangible assets | 1,192 |
Selling, general and administrative |  |
Finite-Lived Intangible Assets [Line Items] |  |
Amortization of acquired intangible assets | 304 | 312
Developed technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Acquired intangible assets, gross | $ 5,050 | 5,050
Developed technology | Minimum |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful lives | 3 years |
Developed technology | Maximum |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful lives | 5 years |
Customer relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Acquired intangible assets, gross | $ 1,270 | 1,270
Customer relationships | Minimum |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful lives | 3 years |
Customer relationships | Maximum |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful lives | 5 years |
Backlog and tradename |  |
Finite-Lived Intangible Assets [Line Items] |  |
Acquired intangible assets, gross | $ 410 | $ 410
Backlog and tradename | Minimum |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful lives | 6 months |
Backlog and tradename | Maximum |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful lives | 18 months |

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