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Summary of Significant Accounting Policies (Tables)
6 Months Ended
Jun. 30, 2015
Summary Of Significant Accounting Policies Tables  
Anti-dilutive shares excluded from computation of Earnings per Share
    Six Months Ended June 30,  
    2015     2014  
Options to purchase common stock     8,641,000       5,210,000  
Warrants to purchase common stock     11,250,000       11,250,000  
Series A and B preferred shares conversion     83,000       83,000  
Potential equivalent shares excluded     19,974,000       16,543,000