XML 45 R34.htm IDEA: XBRL DOCUMENT v3.21.2
Balance Sheet Components - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]        
Depreciation expense $ 0.3 $ 0.3 $ 0.5 $ 0.5