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Note 9 - Concentrations (Tables)
9 Months Ended
Sep. 30, 2023
Notes Tables  
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
   

September 30,

2023

   

December 31,

2022

 

Customer 1

    --       29%  

Customer 2

    --       27%  

Customer 3

    --       15%  
   

Three Months Ended September 30,

   

Nine Months Ended September 30,

 
   

2023

   

2022

   

2023

   

2022

 

Customer 1

    41%       36%       36%       36%  

Customer 2

    1%       1%       1%       13%