Common Stock (Tables)

12 Months Ended

Dec. 31, 2016

Equity [Abstract]

Schedule of shares reserved for future issuance

The Company has reserved the following shares of stock:

	As of December 31,
	2016	2015
Unvested restricted stock	22,150	41,657
Restricted stock units	3,333	150,932
Options to purchase common stock	3,112,771	2,319,772
Warrants to purchase common stock	926,840	926,840
Employee stock purchase plan	68,609	157,480
	4,133,703	3,596,681