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Certain Balance Sheet Components - Accrued and other current liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Payables and Accruals [Abstract]    
Accrued employee compensation and related expenses $ 23,131 $ 19,454
Other 27,202 35,426
Total $ 50,333 $ 54,880