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Note 9. Geographical Information (Tables)
9 Months Ended
Sep. 30, 2015
Segment Reporting [Abstract]  
Revenue based on geographic region
    Three months ended     Nine months ended  
    September 30,     September 30,  
Geographic Region   2015     2014     2015     2014  
North America   $ 2,293,272     $ 2,522,586     $ 7,331,427     $ 8,128,580  
Europe     493,833       697,953       1,605,849       2,224,584  
Total   $ 2,787,105     $ 3,220,539     $ 8,937,276     $ 10,353,164