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Net Loss Per Common Share
6 Months Ended
Jun. 30, 2011
Net Loss Per Common Share  
Net Loss Per Common Share
2. Net Loss per Common Share

Basic loss per common share is based on the weighted average number of common shares outstanding for the six months and three months ended June 30, 2011 and 2010. Diluted loss per share is based on the weighted average number of common shares outstanding, plus the incremental shares that would have been outstanding upon the assumed exercise of all potentially dilutive stock options and other stock units subject to anti-dilution limitations. All stock options and other stock units were anti-dilutive for the six months and three months ended June 30, 2011 and 2010, as a result of the Company's net loss position.