Annual report pursuant to Section 13 and 15(d)

Balance Sheet Components - Additional Information (Details)

v3.20.4
Balance Sheet Components - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]      
Depreciation expense $ 0.9 $ 0.9 $ 0.7