Quarterly report pursuant to Section 13 or 15(d)

Net Loss Per Share - Summary of Common Stock Equivalents of Antidilutive Securities Excluded from Computation of Diluted Net Loss per Share (Details)

v3.19.1
Net Loss Per Share - Summary of Common Stock Equivalents of Antidilutive Securities Excluded from Computation of Diluted Net Loss per Share (Details) - shares
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of net loss per share 4,411,627 5,978,905
Redeemable Convertible Preferred Stock    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of net loss per share 0 5,063,404
Common stock options and awards issued and outstanding    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of net loss per share 4,339,814 820,875
Warrants to Purchase Redeemable Convertible Preferred Stock    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of net loss per share 0 93,527
Warrants to Purchase Common Stock    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of net loss per share 71,813 1,099