Note 7. Net Income (Loss) Per Share Attributable to Common Stockholders

For the periods presented, the following table provides a reconciliation of the numerator and denominator used in computing basic and diluted net income (loss) per share attributable to common stockholders (in thousands, except per share amounts):

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2017			2016			2017			2016
Numerator:
Net income (loss)	$	(977	)	$	(254	)	$	(3,137	)	$	(2,584	)
Less: Accretion of preferred stock		—			(2,825	)		—			(5,650	)
Net income (loss) attributable to common stockholders	$	(977	)	$	(3,079	)	$	(3,137	)	$	(8,234	)
Denominator:
Weighted-average common shares outstanding		20,728			4,423			20,591			4,405
Weighted-average unvested shares of common stock subject to repurchase		(92	)		(102	)		(100	)		(111	)
Weighted-average shares used to compute net income (loss) per share attributable to common stockholders — basic and diluted		20,636			4,321			20,491			4,294
Net income (loss) per share attributable to common stockholders — basic and diluted	$	(0.05	)	$	(0.71	)	$	(0.15	)	$	(1.92	)

For the periods presented, the following outstanding options, warrants and shares of preferred stock were excluded from the computation of diluted net income (loss) per share attributable to common stockholders for the periods presented because their effect would have been antidilutive (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2017		2016		2017		2016
Redeemable convertible preferred stock		—		7,891		—		7,891
Common stock warrants		—		25		—		25
Redeemable convertible preferred stock warrants		—		258		—		258
Unvested shares of common stock subject to repurchase		84		147		84		147
Stock options		2,249		1,845		2,249		1,845