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Note 8 - Concentration of Revenue
9 Months Ended
Sep. 30, 2018
Notes to Financial Statements  
Concentration Risk Disclosure [Text Block]
8.
Concentration of Revenue
The following table indicates the percentage of consolidated revenue represented by each customer that represented more than
10
percent of consolidated revenue in the
three
and
nine
month periods ended
September 30, 2018
and
2017.
Most of our customers have multi-year contracts with recurring revenue as well as professional services fees that vary by period depending on their business needs.
 
   
Three Months Ended September 30,
   
Nine Months Ended September 30,
 
   
2018
   
2017
   
2018
   
2017
 
Customer A
   
3.4%
     
15.4%
     
5.8%
     
10.1%
 
Customer B
   
3.8%
     
14.3%
     
4.5%
     
11.6%
 
Customer C
   
7.0%
     
13.1%
     
7.1%
     
11.8%
 
Customer D
   
17.0%
     
7.3%
     
17.4%
     
27.4%
 
Customer E
   
37.5%
     
−%
     
35.3%
     
−%