Quarterly report pursuant to Section 13 or 15(d)

Loss Per Share (Details)

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Loss Per Share (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Loss Per Share (Textual) [Abstract]        
Potential common shares 27,416,029 26,454,352 27,243,783 27,029,249
Number of common shares to be issued on conversion of preferred stock 11,884,944   11,884,944  
common stock issued as a result of common stock option and common stock warrants exercises     588,372