Net Loss per Share (Tables)

9 Months Ended

Sep. 30, 2020

Basic and diluted net loss per share was calculated as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2020			2019			2020			2019
Numerator:
Net loss	$	(5,023	)	$	(7,749	)	$	(16,161	)	$	(22,134	)

Denominator:
Weighted average common shares outstanding—basic and diluted.		39,321,177			27,810,358			32,808,082			23,431,823
Total		39,321,177			27,810,358			32,808,082			23,431,823

Net loss per share —basic and diluted	$	(0.13	)	$	(0.28	)	$	(0.49	)	$	(0.95	)

Summary of Potential Common Shares Excluded from Calculation of Diluted Net Loss per Share

The following potential shares of common stock, presented based on amounts outstanding at each period end, were excluded from the calculation of diluted net loss per share for the periods indicated because including them would have had an anti-dilutive effect:

	Nine Months Ended September 30,
	2020		2019
Warrants to purchase common stock		12,935,323		3,491,260
Stock options to purchase common stock		4,628,687		11,838,582
Restricted stock units to purchase common stock		—		50,000
Total		17,564,010		15,379,842