Net Loss Per Share Attributable to Common Stockholders (Tables)

3 Months Ended

Mar. 31, 2017

Earnings Per Share [Abstract]

Weighted-Average Equity Instruments Excluded from Calculation of Diluted Net Loss Per Share

The following weighted-average equity instruments were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented:

	Three Months Ended March 31,
	2017		2016
Series A convertible preferred stock		—		2,172,520
Series B convertible preferred stock		—		4,999,976
Unvested restricted common stock		74,013		116,635
Options to purchase common stock		1,330,481		588,832