Net Loss per Share (Details) - shares	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Antidilutive securities excluded from computation of earnings per share
Antidilutive securities excluded from computation of earnings per share	7,837,977	5,842,362
Stock Options
Antidilutive securities excluded from computation of earnings per share
Antidilutive securities excluded from computation of earnings per share	6,660,990	5,506,867
Restricted stock units
Antidilutive securities excluded from computation of earnings per share
Antidilutive securities excluded from computation of earnings per share	1,151,411	323,854
Employee Stock
Antidilutive securities excluded from computation of earnings per share
Antidilutive securities excluded from computation of earnings per share	25,576	11,641