XML 32 R22.htm IDEA: XBRL DOCUMENT v3.10.0.1
Note 8 - Concentration of Credit Risk (Tables)
6 Months Ended
Jun. 30, 2018
Notes Tables  
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
   
Three Months Ended
   
Three Months Ended
 
   
June 30, 2018
   
June 30, 2017
 
Customer
 
Net Sales
   
% of Net
Sales
   
Net Sales
   
% of Net
Sales
 
Customer A
  $
3,660,000
     
22.9
%   $
3,867,000
     
30.2
%
Customer B
  $
4,872,000
     
30.5
%   $
1,565,000
     
12.2
%
   
Six Months Ended
   
Six Months Ended
 
   
June 30, 2018
   
June 30, 2017
 
Customer
 
Net Sales
   
% of Net
Sales
   
Net Sales
   
% of Ne
t
Sales
 
Customer A
  $
8,110,000
     
27.1
%   $
8,294,000
     
29.4
%
Customer B
  $
7,343,000
     
24.5
%   $
4,174,000
     
14.8
%