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Balance Sheet Components - Estimated future amortization expense (Details) - Trademarks and Developed technology rights
$ in Thousands
Dec. 31, 2020
USD ($)
Finite-Lived Intangible Assets [Line Items]  
2021 $ 1,687
2022 1,687
2023 1,687
2024 1,687
2025 1,687
Thereafter 11,102
Finite-lived intangible assets, net $ 19,537