Net Loss per Share (Tables)

3 Months Ended

Mar. 31, 2019

Summary of Basic and Diluted Net Loss per Share Attributable to Common Stockholders

Basic and diluted net loss per share attributable to common stockholders was calculated as follow:


	Three Months Ended March 31,
	2019			2018
Numerator:
Net loss	$	(10,873	)	$	(7,367	)
Accruing dividends on Series A convertible preferred stock		(592	)		(740	)

Net loss attributable to common stockholders	$	(11,465	)	$	(8,107	)

Denominator:
Weighted average common shares outstanding—basic and diluted		1,717,808			457,971
Net loss per share attributable to common stockholders—basic and diluted	$	(6.67	)	$	(17.70	)

Schedule of Anti-dilutive Securities Excluded from Computation of Diluted Net Loss per Share Attributable to Common Stockholders

The Company excluded the following potential common shares, presented based on amounts outstanding at each period end and adjusted for the Exchange Ratio and Reverse Stock Split, from the computation of diluted net loss per share attributable to common stockholders for the periods indicated because including them would have had an anti-dilutive effect:


	Three Months Ended March 31,
	2019		2018
Options to purchase common stock		1,037,089		538,429
Convertible preferred stock (as converted to common stock)		—		3,556,147
Warrants to purchase common stock (presented on an as-converted, as exchanged, split-adjusted basis.		493,927		423,416

		1,531,016		4,517,992