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Note 16 - Concentration of Risk (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]
  

December 31,

 
  

2021

  

2020

 
         

Accounts Receivable:

        
Customer A  13%  11%
Customer B  19%  * 
Customer C  *   18%
         

Net sales:

        
Customer A  21%  15%
Customer B  13% * 
Customer C  *   10%