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Note 10. Geographical Information (Tables)
3 Months Ended
Mar. 31, 2015
Segment Reporting [Abstract]  
Revenue based on geographic region
      Three months ended  
      March 31,  
    2015     2014  
Geographic region            
North America   $ 2,473,314     $ 2,745,206  
Europe     570,468       749,150  
Total revenues   $ 3,043,782     $ 3,494,356