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Common Stock (Tables)

12 Months Ended

Dec. 31, 2015

Common Stock.

Schedule of Common Stock reserved for future issuance

		As of December 31,
		2015			2014
Conversion of Series A Preferred Stock			—			5,356,996
Conversion of Series B Preferred Stock			—			2,655,992
Warrants for the purchase of Preferred Stock			—			12,283
Warrants for the purchase of Common Stock			59,405			34,839
Options to purchase Common Stock			2,557,456			1,385,341
Employee Stock Purchase Plan			182,352			—
​	​	​	​	​	​	​	​
Total			2,799,213			9,445,451
​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​

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