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Note 9. Geographical Information (Tables)
6 Months Ended
Jun. 30, 2015
Segment Reporting [Abstract]  
Revenue based on geographic region
    Three months ended     Six months ended  
    June 30,     June 30,  
Geographic Region   2015     2014     2015     2014  
North America   $ 2,564,841     $ 2,860,789     $ 5,038,155     $ 5,605,995  
Europe     541,548       777,480       1,112,016       1,526,630  
Total   $ 3,106,389     $ 3,638,269     $ 6,150,171     $ 7,132,625