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Note 2 - Revenue (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Revenue from External Customers by Products and Services [Table Text Block]
  

Three Months Ended March 31,

 
  

2022

  

2021

 

Product sales

 $10,322  $12,031 

Administrative fees, freight and other

  1,257   1,554 

Less: sales returns

  (33)  (116)

Total net sales

 $11,546  $13,469