Common Stock (Tables)

12 Months Ended

Dec. 31, 2015

Common stock Abstract

Schedule of shares reserved for future issuance

Shares Reserved For Future Issuance

	As of December 31,
	2015	2014
Shares reserved for Series A Preferred Stock outstanding	—	5,882,352
Shares reserved for future issuances of Series A Preferred Stock	—	4,705,883
Shares reserved for vesting of restricted stock awards under the Founder Agreements	853,680	1,068,383
Shares reserved for vesting of restricted stock awards under the 2014 Option and Stock Plan	964,581	1,510,434
Shares reserved for exercise of stock options	1,022,617	291,052
Shares reserved for issuances under the 2015 Stock Option Plan	1,620,479	—
Shares reserved for employee stock purchase plan	262,362	—
	4,723,719	13,458,104