Net Income (Loss) Per Common Share

Basic and diluted net income (loss) per common share are computed by dividing consolidated net income (loss) by the basic and diluted weighted-average number of common shares outstanding, respectively, for the period. Basic net income (loss) per common share was $0.03 and $(0.08) for the three months ended March 31, 2017 and 2016, respectively. Diluted net income (loss) per common share was $0.03 and $(0.08) for the three months ended March 31, 2017 and 2016, respectively.

The following table shows the calculation of the diluted weighted-average number of common shares outstanding:



	Three Months Ended March 31,
	2017	2016
Weighted-average number of common shares outstanding — basic	59,508,503	58,613,879
Total dilutive effect of outstanding share-based payments	353,397	—
Weighted-average number of common shares outstanding — diluted	59,861,900	58,613,879

The following potentially dilutive share-based payments were not included in the diluted net income (loss) per common share calculations as the impact would have been antidilutive for the periods presented:



	Three Months Ended March 31,
	2017	2016
Stock options	6,768,262	7,394,111
Restricted stock units	2,875,876	1,290,502
Performance awards of restricted stock units	3,088,801	232,208
Shares to be purchased under employee stock purchase plan	31,514	—

The PRSUs outstanding under the 2016 LTIP as of March 31, 2017 were not included in the computation of diluted net income (loss) per common share as the number of shares that will ultimately be issued is contingent upon the Company’s achievement of certain predetermined performance conditions and does not meet the criteria for inclusion per the applicable U.S. GAAP guidance.