XML 47 R32.htm IDEA: XBRL DOCUMENT v3.10.0.1
Note 5 - Concentrations (Tables)
12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
   
December 31,
 
Accounts Receivable
 
201
8
   
201
7
 
Customer A
   
13
%    
29
%
Customer B
   
*
     
14
 
Customer C
   
13
     
13
 
   
Year Ended December 31,
 
Revenue
 
201
8
   
2017
   
2016
 
Customer A
   
18
%    
12
%    
*
 
Customer B
   
11
     
*
     
*
 
Customer C
   
*
     
12
     
13
%