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Concentrations
12 Months Ended
Mar. 31, 2015
Concentrations [Abstract]  
Concentrations
NOTE 8. CONCENTRATIONS
     The following table summarizes customers comprising 10% or more of revenue for fiscal 2015, 2014, and 2013:
 
% of Revenue for Year Ended March 31
2015 2014 2013
Customer A 20% 17% 14%
Customer B 16% 19% 15%
Customer C 14% 15% 16%
Customer D 12% 10% *
   
 
*Less than 10%
 
     
These four largest customers also accounted for 64% of our accounts receivable as of March 31, 2015 and 61% as of March 31, 2014. We believe the receivable balances from these largest customers do not represent a significant credit risk based on past collection experience.

     Revenue by geographic region was as follows:
 
Year Ended March 31
2015 2014 2013
United States $ 11,919,548 $ 11,159,443 $ 12,006,493
Europe   13,779,392   11,065,547 10,666,338
Asia   4,318,209   3,374,202 3,979,862
Other 566,939 335,715 380,726
Total Revenue $ 30,584,088 $ 25,934,907 $ 27,033,419