Note 3—Net Income (Loss) Per Share Attributable to Common Stockholders

The Company has two classes of common stock, Class A and Class B. Basic and diluted net income (loss) per share attributable to common stockholders for Class A and Class B common stock were the same because they were entitled to the same liquidation and dividend rights.

The computations of the numerators and denominators of the basic and diluted net income (loss) per share attributable to common stockholders are as follows (in thousands, except per share amounts):


	Year Ended December 31,
	2014			2015			2016
Net income (loss) per share attributable to common stockholders—basic:
Numerator:
Net income	$	5		$	15,929		$	20,482
Less: Income attributable to convertible preferred stock		(5	)		(10,958	)		—
Add: Preferred stock modification		—			3,793			—
Less: Premium on repurchase of convertible preferred stock		—			—			(47,209	)

Net income (loss) attributable to common stockholders	$	—		$	8,764		$	(26,727	)

Denominator:
Weighted-average shares outstanding		10,233			10,290			18,280

Net income (loss) per share attributable to common stockholders—basic	$	—		$	0.85		$	(1.46	)

Net income (loss) per share attributable to common stockholders—diluted:
Numerator:
Net income (loss) attributable to common stockholders—basic	$	—		$	8,764		$	(26,727	)
Add: Income attributable to dilutive convertible preferred stock		—			1,624			—
Less: Preferred stock modification		—			(3,793	)		—

Net income (loss) attributable to common stockholders—diluted	$	—		$	6,595		$	(26,727	)

Denominator:
Weighted-average shares outstanding		10,233			10,290			18,280
Dilutive convertible preferred stock		—			2,790			—
Options to purchase common stock		2,901			3,699			—

Weighted-average shares outstanding—diluted		13,134			16,779			18,280

Net income (loss) per share attributable to common stockholders—diluted	$	—		$	0.39		$	(1.46	)

The following table presents the anti-dilutive shares excluded from the calculation of diluted net income (loss) per share attributable to common stockholders (in thousands):


	Year Ended December 31,
	2014		2015		2016
Anti-dilutive equity awards under stock-based award plans		307		248		6,069
Common shares issuable upon conversion of convertible preferred stock		21,761		19,320		—
Common shares issuable upon conversion of preferred stock warrants		361		547		—

Total shares excluded from net income (loss) per share attributable to common stockholders—diluted		22,429		20,115		6,069