Loss per Share

We include restricted stock units for which no future service is required as a condition to the delivery of the underlying common stock in our calculation of weighted average shares outstanding. As we incurred a net loss for each of the three months ended March 31, 2013 and 2012, diluted loss per share for both periods is computed on the same basis as basic loss per share, as the inclusion of any other potential shares outstanding would be anti-dilutive. We excluded the following items from diluted loss per common share for the three months ended March 31, 2013 and 2012, because they were anti-dilutive (shares in thousands):

Three Months Ended March 31,

Share-based awards