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Property and equipment
12 Months Ended
Dec. 31, 2012
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Disclosure [Text Block]

4. Property and equipment:

 

Property and equipment consist of the following:

  December 31, 
  2012  2011 
Furniture and fixtures $285,987  $283,231 
Software  57,563   57,563 
Leasehold improvements  39,909   39,909 
Computer and office equipment  245,578   302,530 
   629,037   683,233 
Less - accumulated depreciation and amortization  (477,493)  (392,209)
  $151,544  $291,024 

 

Depreciation and amortization expense was $127,350, $116,465 and $75,610 for the years ended December 31, 2012, 2011 and 2010, respectively.