XML 30 R21.htm IDEA: XBRL DOCUMENT v3.20.2
Note 8 - Concentrations (Tables)
9 Months Ended
Sep. 30, 2020
Notes Tables  
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]
 
 
 
Nine Months Ended September 30,
 
Count
   
2020
   
2019
 
1     $
74,326
    $
82,644
 
2      
47,452
     
46,267
 
3      
40,289
     
41,213
 
4      
38,333
     
38,333
 
5      
32,108
     
38,246