Net Loss per Share (Details) - shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Antidilutive securities excluded from computation of earnings per share
Antidilutive securities excluded from computation of earnings per share	7,754,908	5,763,149
Stock Options
Antidilutive securities excluded from computation of earnings per share
Antidilutive securities excluded from computation of earnings per share	6,643,451	5,460,882
Restricted stock units
Antidilutive securities excluded from computation of earnings per share
Antidilutive securities excluded from computation of earnings per share	1,097,836	291,992
Employee Stock
Antidilutive securities excluded from computation of earnings per share
Antidilutive securities excluded from computation of earnings per share	13,621	10,275