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Note D - Concentration of Risk (Tables)
12 Months Ended
Dec. 31, 2017
Notes Tables  
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]
   
Years Ended December 31,
 
   
201
7
   
201
6
 
                 
Customer A
   
54
%
   
34
%
Customer B
   
*
     
12
%
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
   
As of December 31,
 
   
201
7
   
201
6
 
                 
Customer A
   
55
%
   
35
%
Customer B
   
37
%
   
56
%