Annual report pursuant to Section 13 and 15(d)

Balance Sheets Details - Cash and Cash Equivalents (Details)

v3.20.4
Balance Sheets Details - Cash and Cash Equivalents (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Cash and Cash Equivalents [Line Items]      
Adjusted Cost $ 149,117 $ 90,498 $ 53,039
Money market funds 127,600 71,200  
Money market funds      
Cash and Cash Equivalents [Line Items]      
Adjusted Cost 127,567 71,248  
Estimated Fair Value 127,567 71,248  
Demand deposits      
Cash and Cash Equivalents [Line Items]      
Adjusted Cost $ 21,500 $ 19,300