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Property and equipment (Tables)
12 Months Ended
Dec. 31, 2012
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment [Table Text Block]

Property and equipment consist of the following as of December 31:

 

    December 31,  
    2012     2011  
Computer hardware and software   $ 101     $ 357  
Furniture and fixtures     12       6  
      113       363  
Less: Accumulated depreciation     (88 )     (335 )
Total   $ 25     $ 28