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Net Loss per Common Share (Tables)
3 Months Ended
Mar. 31, 2013
Net Loss per Common Share [Abstract]  
Computations of diluted net loss per share
                 
    March 31,  
    2013     2012  

Share options

    1,888       1,702  

Warrants

    —         88  

Restricted Stock-unvested, issued and held in escrow

    797       1,027  
   

 

 

   

 

 

 

Total

    2,685       2,817