XML 27 R18.htm IDEA: XBRL DOCUMENT v3.21.2
Note 7 - Concentrations (Tables)
9 Months Ended
Sep. 30, 2021
Notes Tables  
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]
     

Nine Months Ended September 30,

 

Count

   

2021

   

2020

 
1     $ 61,350     $ 74,326  
2       54,300       47,452  
3       50,095       40,289  
4       42,294       38,333  
5       40,821       32,108