12. Net (Loss) Earnings Per Share

A reconciliation of net (loss) income available to common stockholders and the number of shares in the calculation of basic and diluted net loss per share follows (in thousands, except share and per share amounts):


	Three Months Ended					Nine Months Ended
	September 30					September 30
	2019		2018			2019		2018
Basic and diluted earnings (loss) per common share:
Numerator:
Net (loss) income	$	(8,210)	$	(1,136)	$	(4,169)	$	2,186
Less:
Net income from discontinued operations, net of tax		—		(1)		—		(5,725)
Deemed dividends on convertible preferred stock		—		—		—		(423)
Net loss attributable to common stockholders	$	(8,210)	$	(1,137)	$	(4,169)	$	(3,962)

Denominator:
Weighted-average shares used in computing basic and diluted net loss per share attributable to common stockholders		7,472,469		5,627,656		5,947,821		5,669,913
Basic and diluted net loss per share attributable to common stockholders	$	(1.10)	$	(0.20)	$	(0.70)	$	(0.70)

The following weighted-average outstanding shares of potentially dilutive securities were excluded from the computation of diluted loss per share attributable to common stockholders for the period presented because including them would have been antidilutive:


	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2019	2018	2019	2018
Redeemable convertible preferred stock	65,428,088	65,428,088	65,428,088	66,138,874
Options to purchase common stock	12,589,387	5,807,298	11,314,536	4,352,695
Warrants to purchase common stock	119,674	65,549	112,181	46,173
Warrants to purchase convertible preferred stock	1,564,952	378,222	1,400,660	—
Total potential dilutive shares	79,702,101	71,679,157	78,255,465	70,537,742