14. INCOME (LOSS) PER SHARE

Basic net income (loss) per share is computed using the weighted-average number of common shares outstanding during the period. Diluted net income (loss) per share is computed using the weighted-average number of common shares and the effect of potentially dilutive securities outstanding during the period. Potentially dilutive securities include stock options, restricted stock units, performance share units, unvested restricted stock awards, performance bonus awards, ESPP shares, warrants and convertible senior notes. If dilutive, those potentially dilutive securities are reflected in diluted net income (loss) per share by application of the treasury stock method, except for the convertible senior notes, which are subject to the if-converted method.

The following table sets forth the computation of basic and diluted net income (loss) per share of common stock for the three months ended March 31, 2018 and 2017 (in thousands, except share amounts and per share amounts):



	Three Months Ended March 31,
	2018			2017
Basic and diluted net income (loss) per share:
Numerator
Net income (loss) - continuing operations	$	(2,795	)	$	(20,869	)
Less: Net income (loss) attributable to noncontrolling interests	4,093			4,032
Net income (loss) attributable to common stockholders - continuing operations	(6,888		)	(24,901		)
Net income (loss) attributable to common stockholders - discontinued operations	—			487
Net income (loss) attributable to common stockholders	$	(6,888	)	$	(24,414	)
Denominator
Weighted-average common shares outstanding	561,735,937			562,195,243

Basic and diluted net income (loss) per share⁽¹⁾:
Continuing operations	$	(0.01	)	$	(0.04	)
Discontinued operations	0.00			0.00
Basic and diluted net income (loss) per share	$	(0.01	)	$	(0.04	)


(1)	The potentially dilutive impacts of outstanding equity awards, warrants and convertible senior notes have been excluded from the calculation of dilutive net income (loss) per share for the three months ended March 31, 2018 and 2017 as their effect on net income (loss) per share from continuing operations was antidilutive.

The following weighted-average potentially dilutive instruments are not included in the diluted net income (loss) per share calculations above because they would have had an antidilutive effect on the net income (loss) per share from continuing operations:



	Three Months Ended March 31,
	2018	2017
Restricted stock units	28,033,489	24,360,648
Other stock-based compensation awards	3,212,026	3,813,848
Convertible senior notes	46,296,300	46,296,300
Warrants	46,296,300	46,296,300
Total	123,838,115	120,767,096

The Company had outstanding performance share units as of March 31, 2018 and 2017 that were eligible to vest into shares of common stock subject to the achievement of specified performance conditions. Contingently issuable shares are excluded from the computation of diluted earnings per share if, based on current period results, the shares would not be issuable if the end of the reporting period were the end of the contingency period. There were up to 3,283,114 and 683,076 shares of common stock issuable upon vesting of outstanding performance share units as of March 31, 2018 and 2017, respectively, that were excluded from the table above as the performance conditions were not satisfied as of the end of the respective periods.