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Net Income (Loss) Per Share
 3 Months Ended
Mar. 31, 2016
Earnings Per Share [Abstract]  
Net Income (Loss) Per Share

Note 8 — Net Income (Loss) Per Share

Basic net income (loss) per share is calculated based on the weighted-average number of common shares outstanding during the periods presented. Diluted net income (loss) per share is calculated based on the weighted-average number of common shares outstanding, including potentially dilutive securities. For all periods presented in the accompanying Condensed Consolidated Statements of Operations, the net income (loss) available to common stockholders is equal to the reported net income (loss).

The calculation of diluted net income per share for the three months ended March 31, 2015 includes the weighted-average of potentially dilutive securities, which consists of common shares underlying outstanding stock options to purchase approximately 4.3 million shares. Stock options to purchase approximately 8.5 million weighted-average shares of our common stock outstanding during the three months ended March 31, 2015 were excluded from the computation of diluted net income per share for that period because their effect was antidilutive.

For periods in which we have generated a net loss, basic and diluted net loss per share are the same due to the requirement to exclude potentially dilutive securities, which would have an antidilutive effect on net loss per share.  During the three months ended March 31, 2016, potentially dilutive securities consisted of common shares underlying outstanding stock options and RSUs.  There were weighted average outstanding stock options and RSUs of 19.7 million shares during the three months ended March 31, 2016.