Loss per Share - Additional Information (Details)	9 Months Ended
	Sep. 30, 2019 shares
Stock Options [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive common share equivalents excluded from computation of diluted net loss per share	1,869,127
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive common share equivalents excluded from computation of diluted net loss per share	1,021,977
Employee Stock Purchase Plan [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive common share equivalents excluded from computation of diluted net loss per share	15,334