XML 17 R45.htm IDEA: XBRL DOCUMENT v3.19.3
Net Loss Per Share (Details) - shares
9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive shares excluded from calculation of diluted net loss per share (in shares) 29,878,302 101,810,405
Stock options to purchase common stock    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive shares excluded from calculation of diluted net loss per share (in shares) 9,492,134 6,075,819
Convertible preferred stock    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive shares excluded from calculation of diluted net loss per share (in shares) 0 61,655,922
Convertible notes payable    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive shares excluded from calculation of diluted net loss per share (in shares) 0 7,856,176
Restricted stock units subject to vesting    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive shares excluded from calculation of diluted net loss per share (in shares) 1,773,155 0
Expected shares purchased under Employee Stock Purchase Plan    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive shares excluded from calculation of diluted net loss per share (in shares) 162,709 0
Founder shares of common stock subject to future vesting    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive shares excluded from calculation of diluted net loss per share (in shares) 15,144,224 21,201,908
Early exercised stock options subject to future vesting    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive shares excluded from calculation of diluted net loss per share (in shares) 3,306,080 5,020,580