Net Loss per Share Attributable to Common Stockholders (Tables)

6 Months Ended

Jun. 30, 2018

Basic and Diluted Net Loss Per Common Share

The following table sets forth the computation of the basic and diluted net loss per common share during the three and six months ended June 30, 2018 and 2017 (in thousands, except share and per share data):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Net loss attributable to common stockholders	$	(6,482	)	$	(9,828	)	$	(11,524	)	$	(13,966	)
Weighted-average number of shares used in computing net loss per share, basic and diluted		11,938,401			3,877,736			10,472,181			2,400,101
Net loss available for common stockholders per share, basic and diluted	$	(0.54	)	$	(2.53	)	$	(1.10	)	$	(5.82	)

Anti-dilutive Security not Included In Diluted per Share Calculations

Since the Company was in a loss position for all periods presented, diluted net loss per share is the same as basic net loss per share for all periods as the inclusion of all potential common shares outstanding would have been anti-dilutive. Potentially dilutive securities on an as-if converted basis that were not included in the diluted per share calculations because they would be anti-dilutive were as follows:

	Six Months Ended June 30,
	2018		2017
Options to purchase common stock		1,071,899		116,514
Convertible preferred stock⁽¹⁾		—		1,100,000
Common stock warrants		12,039		2,053,114
Redeemable convertible notes		—		41,854
Total		1,083,938		3,311,482

(1) As of June 30, 2017, represents 5,500 shares of Series A Preferred Stock on an as converted basis to 1.1 million shares of common stock.