Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Details)

v3.20.2
Summary of Significant Accounting Policies (Details) - USD ($)
1 Months Ended
Mar. 31, 2020
Jun. 30, 2020
Dec. 31, 2019
Jun. 30, 2019
Debt Instrument [Line Items]        
Restricted shares subject to repurchase for unvested shares related to early option exercises under stock equity plans (in shares)   1,485 6,219 25,230
Senior convertible note        
Debt Instrument [Line Items]        
Interest rate (as a percent) 7.00%      
Principal amount of note $ 3,000,000      
Proceeds from debt, net of issuance costs $ 2,371,000