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Note 7 - Concentrations
12 Months Ended
Mar. 31, 2019
Notes to Financial Statements  
Concentration Risk Disclosure [Text Block]

NOTE
7.
CONCENTRATIONS

     The following table summarizes customers comprising
10%
or more of revenue for the
two
most recent fiscal years:
 
   
% of Revenue
for Year
Ended
March 31
 
   
2019
   
2018
 
Customer A
   
21
%    
18
%
Customer B
   
18
%    
19
%
 
     These
two
customers accounted for
41%
of our accounts receivable as of
March 
31,
2019
and
51%
as of
March 
31,
2018.
We believe the receivable balances from these customers do
not
represent a significant credit risk based on past collection experience.