Loss Per Share

We present both basic and diluted EPS amounts. Basic EPS is calculated by dividing net loss by the weighted average number of common shares outstanding during the year. We calculate earnings per share using the two class method where unvested share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are considered participating securities and shall be included in the computation of earnings per share. The two-class method is an earnings allocation formula that treats a participating security as having rights to earnings that would otherwise have been available to common shareholders.

In periods with net income, diluted EPS is based upon the weighted average number of common and common equivalent shares outstanding during the year which is calculated using the treasury stock method for stock options and restricted stock units, the if-converted method for convertible notes, and assumes conversion of our convertible senior notes based on the related fiscal year financial data. In periods with net loss, diluted EPS uses the same shares as basic EPS with no consideration of the if-converted method on the numerator.

Given our net loss position for the years ended December 31, 2014, 2013, and 2012, there are no dilutive securities for these periods. Our anti-dilutive securities for the years ended December 31 are as follows:



	2014	2013	2012
Anti-dilutive share and option units	1,072,000	691,000	771,700
Anti-dilutive 6% Notes	—	17,600	17,600
Anti-dilutive Series A Notes	—	5,226,000	4,740,000
Anti-dilutive Series B Notes	982,000	4,219,000	6,149,000