Net Loss per Share Attributable to Common Stockholders (Tables)

6 Months Ended

Jun. 30, 2019

Earnings Per Share [Abstract]

Schedule of Dilutive Common Stock Equivalents Excluded from Computation of Diluted Net Loss per Share

The following potentially dilutive common stock equivalents, presented based on amounts outstanding at each period end, were excluded from the computation of diluted net loss per share attributable to common stockholders for the periods indicated:

	Six Months Ended June 30,
	2019		2018
Options to purchase common stock		2,957,457		1,871,139
Restricted common stock		94,065		214,789
Warrants to purchase redeemable convertible preferred stock    (as converted to common stock)		—		6,850