Net Loss per Share (Tables)

3 Months Ended

Mar. 31, 2016

Net Loss per Share

Basic and diluted net loss per share attributable to common stockholders

	Three Months Ended
	March 31,
	2016		2015
Numerator:
Net loss	$	(13,039)	$	(2,623)
Accretion of redeemable convertible preferred stock to redemption value		—		(657)
Net loss attributable to common stockholders	$	(13,039)	$	(3,280)
Denominator:
Weighted average shares of common stock outstanding		20,171,518		2,730,427
Less: Weighted average shares of unvested restricted common stock outstanding		—		(695,577)
Weighted average common shares outstanding used in calculating net loss per share attributable to common stockholders, basic and diluted		20,171,518		2,034,850
Net loss per share attributable to common stockholders, basic and diluted	$	(0.65)	$	(1.61)

Potential common shares excluded from the calculation of diluted net loss per share attributable to common stockholders

	Three Months Ended
	March 31,
	2016	2015
Stock options to purchase common stock	1,807,024	500,262
Restricted stock unit awards	67,500	—
Unvested restricted common stock	—	639,611
Convertible preferred stock (as converted to common stock)	—	7,924,919
	1,874,524	9,064,792